diff -ur salesforce_api/salesforce_api.admin.inc salesforce_api/salesforce_api.admin.inc
--- salesforce_api/salesforce_api.admin.inc	2009-09-21 10:16:25.000000000 -0500
+++ salesforce_api/salesforce_api.admin.inc	2009-09-21 16:44:06.000000000 -0500
@@ -390,7 +390,20 @@
   // Loop through all the fields on the object.
   foreach (array_keys($object['fields']) as $field) {
     if ($form_state['values'][$field] == 'fixed') {
-       if(!empty($form_state['values'][$field .'_fixed'])) $map['fields'][$field] = array("type" => 'fixed', "value" => $form_state['values'][$field .'_fixed']);
+      if(!empty($form_state['values'][$field .'_fixed'])) {
+        if(substr($form_state['values'][$field .'_fixed'], 0, SALESFORCE_FIXED_VALUE_PHP_PREFIXLEN) == SALESFORCE_FIXED_VALUE_PHP_PREFIX) {
+          if( user_access('use php for salesforce fixed values') ) {
+            $map['fields'][$field] = array("type" => 'fixed', "value" => $form_state['values'][$field .'_fixed']);
+          } else {
+            // don't keep the field if php not allowed
+            
+            // print a warning message
+            drupal_set_message(t('field @field ignored: permission denied ("use php for salesforce fixed values")', array('@field' => $field)), 'error');
+          }
+        } else {
+          $map['fields'][$field] = array("type" => 'fixed', "value" => $form_state['values'][$field .'_fixed']);
+        }
+      }
     }    
     // If a field has been mapped to this field on the form...
     elseif (!empty($form_state['values'][$field])) {
diff -ur salesforce_api/salesforce_api.module salesforce_api/salesforce_api.module
--- salesforce_api/salesforce_api.module	2009-09-21 10:16:26.000000000 -0500
+++ salesforce_api/salesforce_api.module	2009-09-21 16:44:20.000000000 -0500
@@ -34,6 +34,10 @@
 define('SALESFORCE_LOG_SOME', 5);
 define('SALESFORCE_LOG_ALL', 10);
 
+// Define PHP prefix for fixed-value fields
+define('SALESFORCE_FIXED_VALUE_PHP_PREFIX', '<?php ');
+define('SALESFORCE_FIXED_VALUE_PHP_PREFIXLEN', strlen(SALESFORCE_FIXED_VALUE_PHP_PREFIX));
+
 
 /**
  * Implementation of hook_menu().
@@ -119,7 +123,7 @@
  * Implementation of hook_perm().
  */
 function salesforce_api_perm() {
-  return array('administer salesforce');
+  return array('administer salesforce', 'use php for salesforce fixed values');
 }
 
 /**
@@ -575,7 +579,12 @@
   foreach ($map['fields'] as $key => $value) {
     // allow fixed values
     if (is_array($map['fields'][$key]) && $map['fields'][$key]['type'] == 'fixed' && !empty($map['fields'][$key]['value']))  {
-      $object->$key = $map['fields'][$key]['value'];
+      if(substr($map['fields'][$key]['value'], 0, SALESFORCE_FIXED_VALUE_PHP_PREFIXLEN) == SALESFORCE_FIXED_VALUE_PHP_PREFIX) {
+        $code = substr($map['fields'][$key]['value'], SALESFORCE_FIXED_VALUE_PHP_PREFIXLEN);
+        $object->$key = eval($code);
+      } else {
+        $object->$key = $map['fields'][$key]['value'];
+      }
     }    
     // If a handler is specified for retrieving a value for the source field...
     elseif (isset($source_object['fields'][$value]['export'])) {