This is not the place for support requests, please file a ticket on bugs.itopen.it.

That said, Simple ACL does not support custom user-defined groups, it’s clearly written in the main page (one of the first paragraphs):

“Custom groups creation is not supported (but you won’t miss it!)”

See:
http://www.itopen.it/2008/09/24/simple-acl-ready-for-joomla-15/

They said this was simple, but I’ve followed the instructions the best way I can and this isn’t working for me at all. Please help because I have a deadline – yikes!

And yes, 1.6 will maybe make Simple ACL obsolete, but if you have tried 1.6 you know that ACL are far from being simple and easy to use, a simpler solution like Simple ACL will probably be still useful for 1.6.

Certainly looks cool! I was wondering whether it would solve my issue:

A menu item action needs to be dependent on user (logged in or NOT logged in). The action is a FORM (Breezingforms component). So, if I could make 2 menu items (same label) and one points to form A and the other to form B and your tool woud allow assigning access rules to those forms, it would do the job. Right?

Further: what about 1.6? Would it make your tool obsolete?

Thanks for your time.
Lolke