To do that, you can follow these instructions:
This is for a virgin C: drive. If you have other files on C:, then you'll have to know what they are and keep them where they are (don't delete them in step 4, or back them up and then replace them).
To get access to the C: drive, either use a gamesave exploit to run EvoX and FTP, or hotswap the Xbox drive.
1. Download Slayer's EvoX Auto-Installer 2.5 ISO (from IRC).
2. Use an Xbox ISO program like Craxtion (
http://www.craxtion.com/) to extract the ISO to a known location on your hard drive.
3. Back up your entire Xbox C: partition.
4. Delete everything on the C: partition.
If you're using FTP, do NOT reboot or turn off the Xbox before completing the next step.5. Go to your extracted ISO files and copy everything in system\c\all to the C: drive.
6. Reboot and confirm that you now have a working copy of Dashboard 4920 (System Info).
Do NOT skip this step and start installing exploits right away.7. Now you can go and install any exploits you want.