I recently had my xbox modded by jebjeb and he did a great job.
I had a Xecuter3 CE chip which I tried to install and messed up. Jeb cleaned up my mess and did a thorough job of resinstalling it.
He is very competent and also very patient. If you live in DFW area there is absolutely no reason to take your xbox to anybody else. Even if you don't live in DFW area you can contact jebjeb and send your xbox by post.
New Installs! No Problem.
Messed up installs! No problem.
Software issues! No Problem.
There is jebjeb for you to contact for all your issues.
Happy Modding!
SK