Its not really off topic, since it would have solved the OP.
I requested Ptex for TG2. I think they will add it in time. But I understand why its not a priority, there are more important things to work on in TG2. Also, the rest of the industry is taking their own sweet time too. Mudbox has it built in. But finding information on using it in maya is ridiculous! At least up to 2013. 2014 just came out but haven't had time to check into it. Im not sure, but I think only renderman (?) fully supports Ptex. Despite that its open source for everyone now.
Its stupid. All of the mapping options of every program suck. Thats why there are 3rd party softs for it, like UV Layout for one.
Ptex is superior in every way I have seen to mapping. Mapping is fundamentally stupid. It was a clever solution to a real problem, but it can only ever be a bandaid on a gaping head wound. It often takes longer to map a complex object then it does to model one, and thats the stupid part that mapping can't overcome.
With out a doubt, I hate mapping. Its a destroyer of creativity no mater what tools you have. Its a complete waste of time that contributes nothing to the creative process. Just more work. I cant wait until its just an option that maybe you may need to use, or until its completely dead.
Dont want to insult the people who invented it. It is a solution, just a bad one.