Flashing a Rom is easy just make sure you create a Nandroid Backup first, and i would also suggest that you download Titanium Backup Pro from the market so that you can quickly and easily replace your apps and system data when switching between roms. Saving the Headache is worth Spending the $6. Select one of many Roms from the sidebar make sure to read your roms install instructions they very from rom to rom.

Enjoy your New Droid X (roming the phone will make it feel like a brand new phone guarunteed!)