Rather than using Odin to flash a whole phone image, try just installing cwm
http://androidforums.com/showthread.php?t=390234
Then simply flashing ctmod.
Install CWM with Odin
1. Download and unzip CWM5027-SPH-M8200-FOR-ODIN-FIXED2A.zip
2. Download stick.zip and copy stick.zip to SD Card
3. Install the Samsung USB drivers (if you don't already have them)
4. From a powered off phone put phone into Download Mode by holding Volume Down, Camera Button, and Power button until the Yellow Downloading message appears
5. Plug phone into USB port
6. Open Odin (on your computer), you should see a yellow box with a com number
7. Select SPHM820.ops in the OPS box
8. Put a check in One Package
9. Select the CWM5027-SPH-M8200-FOR-ODIN-FIXED2A.TAR file in the One Package box
10. Click Start
11. When Odin says reset and the phone reboots Hold Vol UP, and Power button until you are in CWM DO THIS QUICKLY BEFORE PHONE BOOTS, IF PHONE BOOTS UP ALL THE WAY START BACK AT STEP 4. you do not have to wait for Odin to say pass, that does not work
12. In CWM go into install zip from sdcard (use volume buttons to scroll between options and home button to select)
13. select choose zip from sdcard
14. select stick.zip
15. select Yes - Install stick.zip
16. After it is done installing Press back button
Then flash Ctmod
(Start with chapter 3 of the root guide)
