Again, Droidmod is really a subpar experience compared to the other ROMs. In terms of "get it done easily", CyanogenMod is the new DroidMod. If you need to get back to stock,
this is the easiest and best way to do it and it works regardless of what ROM you're on.
The easiest way for a beginner to root and still end up with a decent ROM is to get the rooting update.zip, use DroidRootHelper to get busybox and flash_image.
This guide is fairly old but it's what I used. If you follow this guide exactly as provided, you'll end up with an old version of SPRecovery (bad) and a decently new version of Bugless Beast.
What you want to do is follow it up until the "now to download bugless beast" line. Stop there and go download ROM Manager from the market and do as follows:
1) Open ROM manager and "Flash ClockworkMod Recovery"
2) Go into "Download ROM" on ROM Manager and choose CyanogenMod and then pick the latest version (at the time of this writing it's CyanogenMod 5.0.5.3). Make sure you check off Google Apps in the popup box otherwise you won't have a Market anymore!
3) Let it download and then it'll ask you if you want to make a backup and if you want to wipe data/cache. I highly recommend checking both of these boxes and then hitting OK.
4) Let the phone reboot and that's it. CyanogenMod is installed.
I just started using CyanogenMod (I used to use Bugless Beast) but the two are very similar and CyanogenMod is easier for beginners to use in that you can do most of it from the phone, rather than messing with your computer back and forth.