Hi,
you should declare in install file that your recordset has template for view_entry mode (add, edit)
In Campaign manager it looks like this:
Utils_RecordBrowserCommon::set_tpl('premium_campaignmanager_messages', Base_ThemeCommon::get_template_filename('Premium_CampaignManager', 'default'));
CampaignManager template file is: modules/Premium/CampaignManager/theme/default.tpl
basic view entry template for RB is: modules/Utils/RecordBrowser/theme/View_entry.tpl
Remember that smarty templates require to be compiled, so after editing tpl file in theme directory of module, you have to run "Theme up" from /admin tools to update compiled version.
Regards,
Adam