I understand everything there except the "flash it with the .sbf" part... Are there any instructions out there on this?
yes, click that link, go to about the middle of the page, and they're all highlighted in yellow. that will put your phone to stock 2.1. the instructions are pretty good on how to flash it. just make sure you do a data wipe first.
to put the phone in bootloader mode (after you've wiped), hold the camera and volume down buttons, and power on. you will see some white lettering on the left telling you to connect with usb. after you have downloaded the RSD, installed the drivers, moved the .ini file, you can open the program, locate the .sbf file, and click start. this will flash it back to stock.
here are the instructions (credit to rootzwiki):
32Bit Drivers or 64Bit Drivers are with the sbf above.
SBF INSTRUCTIONS: Install the RSDLite 4.7 program by double clicking on the program.
Move the pst_flash.ini file into the following folder --> Program Files/Motorola/RSDLite
2. Install the drivers that apply to your Operating System.
3. Unzip the SBF into a folder.
4. Open RSD Lite and find the UNZIPPED SBF
5. Put your Motorola Droid X in bootloader mode. Now connect the Droid X via usb.
6. Click start and sit back.