The devour uses the same NV Items as the droid, droid 2, and droid x. I'm sure you can find a download for one of these.

In all honesty, if you are having problems with web/mms, I'd suggest just switching the Cricket plan to the $55 dollar android plan and calling it a day. All the steps would be the same (besides configuring the proxy); and from my experience, this method a lot more stable.