CD95YJ
Member
I'd 86 ROM Manager all together, its been buggy lately. You don't need it really since you have Koush's bootstrap. ROMs can be downloaded directly from here and flashed in recovery. Make sure to make a stock backup and before flashing (installing) each ROM and/or theme, etc.
DroidForums Junkie!!
What he said (about ROM manager). About the only phone that ROM manager really was ever recommended for and seemd to work well for (my opinion) was the OG Droid.
Make sure you get something like Astro file manager from the market. If you use Astro, under the settings enable downloads from the web, that way you can download ROMs straight to your phone and you don't have to worry about possible file corruption moving it from your computer to your SD card, however downloads get corrupted from time to time straight to the phone too so...
Make sure to follow all the instructions for flashing a ROM. After you flash a few you'll see that doing a cache and data wipe is pretty standard unless your flashing a newer version of a ROM already running on your phone. You may even make the "rookie mistake" I'm sure we have all made by flashing a new ROM without making a backup of your stock ROM. Don't freak out there is a way back to stock, but after you SBF your phone a time or two you remember to do a nandriod every time you flash a new ROM.
Have fun rooting, and I'm sure if you have anymore questions or issues we will be here to walk you through restoring your phone.