Can you not just install Zip if i am on GB .588?
There are two zips. One if you are on froyo and one if you are already on gb. Be warned I used the gb to gb zip when on the 5 zip deodexed gb 588 and I bootlooped. Sbf back to 340 and did the full update and it worked perfectly.
Droid X - Deodexed, Liguid Gingerbread 2.3, QuickClock Advanced balanced. Go Launcher and SwiftKey. Handcent SMS.