I know

Ok I tried it again and I was able to remove the profile (first time it said removal failed)
Ok, second time installing the new profile and I scroll the wheel to "US- AT&T".
After that the APN, username and password are all filled out for me.
BUT . . . i cannot change the V3 tethering +MMS to YES - it's like it's greyed out (or the mac equivalent). I pressed it many times, slid it, spit on it, etc
This is on a new 3GS btw.
Anyone else got this working on a 3GS?