OK I use to due the same thing. I was so much easier. So. I has problems sbfing because I'm on windows 7. So from the droidx forums I got instructions to burn a Linux disk with froyo included to get back to stock froyo. Search the droidx forums under Droid x hacks for 1KDStaz or just 1KDS to getting the instructions. They are easy to follow and I've used this method a bunch of times.
You might also want to try the one click available for the droidx that people are using to root 602. Don't know if it will work on 588 but it won't hurt. It might just not work. If it does then you could use the leaked rooted 602 that's out