:$ Thank you both very much for your help. I must have been too tired last night, but all is working now, I've tested and retested. I hope I've not wasted any time for either of you. Usergroup 10 can now successfully access pm's, as well as send and receive pm's from other members in the same usergroup.
Members outside the usergroup cannot send pm's into the "10" group, and the "10" group cannot send pm's to other members in other groups.
This is also restricted to admin as they can't pm usergroup 10, but that is quite alright. This is working exactly as I had hoped for.
Thanks again, G-Force for all your help and patience! And thanks, PPN, for taking time to help, as well. You pointed something major out that I won't embarress myself to tell.

But thanks.