Legally, you can not run a ROM from another manufacturer on your device. ROMs are copyrighted work. While you may be able to load it, technically you should not do so.
To add to this in a non-legal sense; the ROMs are built buy the manufacturer and customized for the specific device. There are a number of differences between devices and thus you could be making your device unstable. Cingular may have choosen a different video chipset, or a specific IO driver for improved speed. (I'm just making examples, I don't know if they did or not) By installing another ROM, you may get things running, but you might also find more problems.
I remember a ROM that went around a while ago that had a number of people complaining of things not running and stability issues.
Legally, you shouldn't be doing it. Technically, you may be able to do it, but it's really not recommended.
And a nice little disclaimer; we don't allow linking to or sharing of, illegal ROMs.
Well, for that matter, illegal or copyrighted material of any kind.
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