In vtiger CRM 5.x and coreBOS code prior to December 2014, this task is still cumbersome and requires code modifications.

This page describes the process by documenting the answer given by srhtech in the vtiger CRM forum thread Quote information mapping when adding orginzation.

You have to edit include/utils/ListViewUtils.php which is in charge of creating the list so the links have more information, then you have to modify the javascript to use those new fields and fill in the fields. That is in the modules' javascript file.

I went to the include/utils/ListViewUtils.php file and edited the following between 1957 and 2017

elseif ($popuptype == "specific_account_address") {
require_once('modules/Accounts/Accounts.php');
$acct_focus = new Accounts();
$acct_focus->retrieve_entity_info($entity_id, "Accounts");
$slashes_temp_val = popup_from_html($temp_val);
$slashes_temp_val = htmlspecialchars($slashes_temp_val, ENT_QUOTES, $default_charset);
$xyz = array('bill_street', 'bill_city', 'bill_code', 'bill_pobox', 'bill_country', 'bill_state', 'ship_street', 'ship_city', 'ship_code', 'ship_pobox', 'ship_country', 'ship_state', 'cf_709');
for ($i = 0; $i < 12; $i++) {
if (getFieldVisibilityPermission($module, $current_user->id, $xyz[$i]) == '0') {
$acct_focus->column_fields[$xyz[$i]] = $acct_focus->column_fields[$xyz[$i]];
}
else
$acct_focus->column_fields[$xyz[$i]] = '';
}
$bill_street = str_replace(array("\r", "\n"), array('\r', '\n'), popup_decode_html($acct_focus->column_fields['bill_street']));
$ship_street = str_replace(array("\r", "\n"), array('\r', '\n'), popup_decode_html($acct_focus->column_fields['ship_street']));
$count = counterValue();
$value = 'column_fields['bill_city']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_city']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_state']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_state']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_code']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_code']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_country']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_country']) . '","' . popup_decode_html($acct_focus->column_fields['bill_pobox']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_pobox']) . '", "' . popup_decode_html($acct_focus->column_fields['cf_709']) . '");\'id = ' . $count . '>' . textlength_check($temp_val) . '';
}
elseif ($popuptype == "specific_contact_account_address") {
require_once('modules/Accounts/Accounts.php');
$acct_focus = new Accounts();
$acct_focus->retrieve_entity_info($entity_id, "Accounts");

$slashes_temp_val = popup_from_html($temp_val);
$slashes_temp_val = htmlspecialchars($slashes_temp_val, ENT_QUOTES, $default_charset);

$bill_street = str_replace(array("\r", "\n"), array('\r', '\n'), popup_decode_html($acct_focus->column_fields['bill_street']));
$ship_street = str_replace(array("\r", "\n"), array('\r', '\n'), popup_decode_html($acct_focus->column_fields['ship_street']));
$count = counterValue();
$value = 'column_fields['bill_city']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_city']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_state']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_state']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_code']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_code']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_country']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_country']) . '","' . popup_decode_html($acct_focus->column_fields['bill_pobox']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_pobox']) . '", "' . popup_decode_html($acct_focus->column_fields['cf_709']) . '");\'id = ' . $count . '>' . textlength_check($temp_val) . '';
} elseif ($popuptype == "specific_potential_account_address") {
$slashes_temp_val = popup_from_html($temp_val);
$slashes_temp_val = htmlspecialchars($slashes_temp_val, ENT_QUOTES, $default_charset);

// For B2C support, Potential was enabled to be linked to Contacts also.
// Hence we need case handling for it.
$relatedid = $adb->query_result($list_result, $list_result_count, "related_to");
$relatedentity = getSalesEntityType($relatedid);
if ($relatedentity == 'Accounts') {
require_once('modules/Accounts/Accounts.php');
$acct_focus = new Accounts();
$acct_focus->retrieve_entity_info($relatedid, "Accounts");
$account_name = getAccountName($relatedid);

$slashes_account_name = popup_from_html($account_name);
$slashes_account_name = htmlspecialchars($slashes_account_name, ENT_QUOTES, $default_charset);

$xyz = array('bill_street', 'bill_city', 'bill_code', 'bill_pobox', 'bill_country', 'bill_state', 'ship_street', 'ship_city', 'ship_code', 'ship_pobox', 'ship_country', 'ship_state', 'cf_709');
for ($i = 0; $i < 12; $i++) {
if (getFieldVisibilityPermission('Accounts', $current_user->id, $xyz[$i]) == '0') {
$acct_focus->column_fields[$xyz[$i]] = $acct_focus->column_fields[$xyz[$i]];
}
else
$acct_focus->column_fields[$xyz[$i]] = '';
}
$bill_street = str_replace(array("\r", "\n"), array('\r', '\n'), popup_decode_html($acct_focus->column_fields['bill_street']));
$ship_street = str_replace(array("\r", "\n"), array('\r', '\n'), popup_decode_html($acct_focus->column_fields['ship_street']));
$count = counterValue();
$value = 'column_fields['bill_city']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_city']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_state']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_state']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_code']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_code']) . '", "' . popup_decode_html($acct_focus->column_fields['bill_country']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_country']) . '","' . popup_decode_html($acct_focus->column_fields['bill_pobox']) . '", "' . popup_decode_html($acct_focus->column_fields['ship_pobox']) . '", "' . popup_decode_html($acct_focus->column_fields['cf_709']) . '");\'id = ' . $count . '>' . textlength_check($temp_val) . '';

The basics of all that was to edit

$xyz = array('bill_street', 'bill_city', 'bill_code', 'bill_pobox', 'bill_country', 'bill_state', 'ship_street', 'ship_city', 'ship_code', 'ship_pobox', 'ship_country', 'ship_state', 'cf_709');

to include the custom field, and then add

 , "' . popup_decode_html($acct_focus->column_fields['cf_709']) . '"

to send the data to the javascript function.

Then I edited the modules/Accounts/Accounts.js and added the following at line 103

if(typeof(window.opener.document.EditView.cf_821) != 'undefined')
window.opener.document.EditView.cf_821.value = cf_709;

Thank you srhtech !!