hi,people i have the sprint touch i have been looking at this custom roms and im about to go crazy with these customs roms

,but i upgraded radio 3.42 before i knew any of this custom roms thing.so i would like to know what would i have to do for me to intall this,what is the risk brinking? its worth taking the risk? thanks..
my specs:
Rom version: 3.03.651.2
Rom date: 06/23/08
Radio version: 3.42.30