HELP? Please!!!

[Leukay]

i bought a sprint htc touch on ebay and flashed the alltel software on it. i managed to finally get it activated on my account and i can do everything, data, texting, calling, it all works. the only thing wrong, which is a decently big thing, is that above the time on the today screen, it still says "Sprint PCS" instead of the much more preferred "Alltel". i know that the device is definitely connected to the sprint towers and that means i am roaming pretty much all of the time...if anyone could help me out with how to tweak the settings to make it connect to the alltel towers, i would be truley thankful. i want this beautiful device working to its full potential! thanks in advance