If you don't know how to root your Droid 2 Global then then you'll need this:
Droid 2 Global ROOT, CUSTOM RECOVERY & SIM UNLOCK Tutorial - Droid Forum - Verizon Droid & the Motorola Droid Forum
That thread has a place to download the Droid2Bootstrap.apk for free but I reccomend you support Koush and get it on the market for all of his hard work!
I'm fairly certain the only ROM available for the Droid 2 Global right now is Fission and that can be found here:
[ROM]Fission 2.4 Droid2 Global-Vanilla Generic Android-AOSP Like-Fission ROM Manager - Droid Forum - Verizon Droid & the Motorola Droid Forum
They also have there own website and IRC listed in that post for support.
Other than that enjoy your Droid 2 Global and feel free to ask me any questions!