Changing the custom entity prefix in Microsoft Dynamics CRM 2011

The prefix that will be used when new attributes are created can be changed by updating the default publisher. This can be done by following the steps below:

1. Navigate to Settings > Customizations > Publishers.
2. Select the default publisher from the list.
3. Modify the prefix, changing it from new to the desired custom prefix, and click Save and Close.
4. Publish customizations by going to Settings > Solutions, and clicking Publish All Customizations.

Additionally, if you would like to create some fields with the new_ prefix, and some fields with the custom prefix, you can create a custom solutions that utilizes the new prefix. You can also utilize multiple different custom prefixes by creating separate solutions that utilize these prefixes.

http://support.microsoft.com/kb/2500602