MDA Compact – T-Mobile Screen

[Guest SO3]

Can someone please tell me how to banish the t-mobile 'screen that appears built in! But in particular the one that appears when I do a reset.

I have searched the device and found something called TMO_Wallpaper in the Extended_Rom folder, but when I try to delete it is says 'Unable to access the file. 35000:103:2'

Is there some sort of registry entry I need to change?

Thanks in advance.