Before you do anything else. Do a nandroid backup of your current setup..so you can revert if you need to.
Download the MR 2.5 radio
HERE. To install a radio. rename PG05IMG.zip and move to root of SD card. Power off phone. Hold volume down button while powering on. This will boot you into Hboot. Then press power button once...it will find the update...then ask you if you want to install. Press Volume UP for yes...let it install...once done...press power to reboot. (personally the MR2 radio gives me the best reception where Im located, it varies for each user)
After you reboot, go rename that radio zip to MR2.5PG05IMG.zip and move it or you can leave it there. I created a folder specifically for radios and roms on my sd card...and name them accordingly.
I cant post the link to Gingeritis 1.1 because Chingy requests not to. You can register at themikmick forums (takes a few seconds and its worth it)...then all support will be handled there. Chingy ditched XDA because he is sensitive to some moron complaining about his rom autowiping during the flash and losing texts...which He shouldve backed up first anyway. The only issue i have with gingeritis is the voicemail notification stays after listening to the voicemail. it goes away after reboot...but this has been similar on just about every gb rom ive tried.
TO install a rom, you do the same as the D1 (assuming you had one), just put the zip on the root of sd card, boot to recovery, wipe data, wipe cache, go to mounts and storage format /system (careful DO NOT format /sdcard!!!).
Then just install zip from sdcard, choose zip, and install. You will be scrolling with the volume buttons and choosing with the power button while in recovery.
Thats it. Netflix is included in the rom i believe. If not...go here and follow the latest releases. Old releases will give a popup saying a new version is available and want you upgrade. People post the new versions up all the time so you can update. (until netflix makes compatible with the tbolt)
TONS of new development at xda dev. Check out the forums.
Thunderbolt Android Development - xda-developers
If you want to go back to froyo, i recommend bamf 1.8.6....it works with the MR2 and MR2.5 radios.
Sorry for the long post. Check your PMs.