[DarkLord]

Originally Posted by iknowsquat

Downgrading Froyo is not covered here, however after you downgrade you can use this tutorial to obtain root and learn about flashing ROMs.
First go here for downgrading instructions:
http://forum.xda-developers.com/showthread.php?t=765496
EDIT:FASTRX8 Does have this link in Post #2

Once it says:
Once it is finished, select restart. You now are on the stock 2.1 build of Android.

you can either continue with their instructions or come here and follow the tutorial for root.
If you choose to use these instructions then you will most likely start with Step 5 Root after 1.47 OTA-confirm your software version via Menu/settings/about phone/software info/software number

With these instructions you will want a rooted version of Froyo such as this:
http://forum.xda-developers.com/showthread.php?t=743352

As I understand it if you follow the unrevoked instructions from the thread I linked you have some more options about what to flash.
Hope that helps.

damn squat, you're everywhere.