After sevaral hours, finally got FW1.1.1 working with TSIM. I was previously on TSIm+unlocked iphone (i.e. no change in baseband). Activation and all works if everything is followed as in Dev wiki. Calls in and out, SMS etc all OK, but YouTube is not working. Havnet attempted previous youtube hack yet.

iTunes store is great on iPhone - especially to preview tracks/albums before buying.

so basically you did not have to modify your TSIM in anyway just activate the iPhone?

So if I have a legitimately activated iPhone, i.e. Through AT&T, and a preconfigured TurboSim I should be able to just pop it in and it should work?

I want to know if there is an windows version of these process?
Thank you for all genius guys.

^ Someone has posted a thread to windows instructions in the "General" section of this iPhone forum.

As for a preconfigured TSIMw with activated AT&T, it will work, but provided I think that the TSIM is preconfigured with IMEI of your AT&T activated IMEI number.