Updating Motorola Devour, Firmware problem, please help.

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Aug 4, 2010
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OK so currently on my Motorola Devour I am running firmware 1.6, when I try to install 2.1 or 2.2 it wont let me, i keep getting an error like this
E:Can't open /cache/recovery/command, is there another update like 1.8 or something I need first? Is this phone not able to update?!?!

--Install from sdcard...
Finding update package...
Opening update package...
Verifying update package...
E:signature verification failed
Installation aborted

I've tried to install the file from like 4 different sources and none will work. I used these links for reference on how to install the updates, but they won't work. Can the Devour be updated?

[How-To] Force the Official Android 2.2 Froyo Update for the Motrola Droid - Android Forums

rooting and... - Android Central Forums

Manual Android 2.1 Update for Motorola Droid | Droid Life: A Droid Community Blog

Can anyone help?
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