Could you please make a version without any modifications to UI (without anything removed including "stupid stuff" like Welcome links, etc, and without any custom stuff added (like pics, additional apps))? It's not a Tornado with 64mb rom!
And does 3G calling work with this rom?
Take the rom as it is.. If you dont like it, learn to make your own?
Nothing is added that should slow down your device more than a standard WM 6.1