HTC Desire :: How Would I Go About De Branding Phone

firstly, i have a htc Desire and must say that im loving the android phone. my phone is with t-mobile, and i get the t-mobile start up screen aswell as the htc start up screen, so im assuming my phone is t-mobile uk branded.now, my question is, how would i go about debranding the phone, and would this be complicated/ problematic for somebody who is new to android.would problems arise from de branding the phone, and would it become a standard htc desire when debranded?i ask these questions because i would like to debrand my htc desire so i could get the official 2.2 froyo release starting this weekend, without having to go through the process of rooting which im sure would lead me to have a breakdown.