I've read the help files for AFCAD 2.11 and there were no topics on making Helipads for your airports. I have opened stock airports in FS, such as KJFK, or PHNL. They show helipads on the AFCAD screen so i know that it's not JUST visual scenery.
Can someone PLEASE tell me how to insert them to my airports??
Until AFCAD is updated, you'll want to master the new bglcomp and it's XML coding.
It can add helipads as a separate BGL, and they should show in the sim. The helipad code is primarily visual... it doesn't "harden" a surface. That can be done with a small FS9 runway.