edit build-prop

[mallard729]

I need to update my build-prop which lives inside the data.img file that resides on your sd card,
root>system>build-prop
i'm trying to download verizon nfl mobile from the marketplace but i can't because the line in the build-prop
ro.com.google.clientidbase=android-tmobile
i think if i can get that file updated to read
ro.com.google.clientidbase=android-verizon

I should be able to dl the app from the marketplace. right now i don't see it, i can dl other apps just fine
I was able to get a copy of the app, but the videos neverwork, wonder if that is related to the
ro.com.google.clientidbase=android

tried using winimage to edit the img file but no dice