Sounds to me as you are looking to RGH a Xenon? I don't think your going to have much luck finding someone to do that for you. Xenons are a pain to get Freeboot running if at all.So, I thought to RGH my XBox 360.
The Dashboard version is 2.0.17502.0 and I cannot really find any guides online for this so I decided to ask here.
My motherboard is Xenon, and I can supply other information if needed.