Welcome to being rooted! You like me took the easy way out with droidmod... which can have its drawbacks...
For example, i'm jsut running droidmod 1.0, which has everything i want personally, but taking this easy way out has left me myself a little confused on how to load custom roms. Some us Nandroid backup folder to load, some you use the update.zip method, and thats got me all baffled.
I would be at an ESE53 build right now just for kicks if i wasn't still a little confused on how to do so and keep my data/apps. Custom ROMs are definitely easiest done if you REALLY know what your doing... I've been reading the hacks section literally ALL DAY today trying to make myself comfortable with moving to a new ROM...
So in conclusion, what I suggest for you for the time being is to install the DM 1.0 provided until you're really comfortable with what's going on on your phone. It works well, provides lots of 2.1 features, and, just like the rooting itself with DM, its super easy to do.
Then of course, go ahead and over clock that bad boy! :icon_ banana: