I moved this up to the root section where other rooters could see it.
I think that you're only option is to choose a rom and flash it.
You may choose a stock or stockish rom, or you may save trouble with one of the several advanced Sense roms. For that, many of us are running the ViperOneM8 rom. It's already rooted, busybox installed and is easily modified without resorting to flashing.
There's also a selection of Senseless roms - including an option in the Viper installer to leave it off and roms made from completely different codebases, such as CM.
Once things are basically set up, make a nandroid backup and then again before flashing anything.