PSM Release for Custom BOs

Hi, experts,

      I want to  know whether it is possible to make a custom BO  act  like a standard BO.

      We only create it once, and we will be able to add extension fields as we do to standard BOs.

      So, my question is "Can I ask for a PSM Release for my custom BO?". Or is there any other workaround.

Regards,

Naing