WARNING - These files are provided as-is with no warranty. I take no responsibility for what you do with it, what happens to you or your device because of these files. You've been warned.
WARNING - You must own a GT-I9000 in order to use or download these files.

WARNING WARNING WARNING - YOU MAY BRICK YOUR DEVICE - YOU MUST KNOW WHAT YOU ARE DOING - WARNING WARNING WARNING

Instructions for the secondary boot loader:

With heimdall (in download mode):

# heimdall flash --secondary-boot-backup Sbl.bin

The XWJM2 version is currently recommended for CM7.

Did I say it's dangerous? ITS DANGEROUS