Before you start, it is optional to run the ISO through abgx360 just to make sure it is a good ISO. needed files: cfg1 cfg2 Netham45's ISO tool (32 bit) Netham45's ISO tool (64 bit) wx360 A L4D(1) ISO no link find it yourself okay I am going to simplify this as much as I can. 1. Download the ISO and use wx360 to open the ISO 2. Once opened in wx360 navagate to the Left4Dead(1) folder 3. Right click and extract the zip0.360.zip Make sure it is the one in the Left4Dead(1) folder not the HL2 folder 4. once extracted open Netham's tool 5. create a folder (anywhere doesn't really matter I chose desktop[name doesn't matter either]) 6. now in Netham's tool hit the three dots after the zip field in the zip->folder catagory 7. find and select your zip 8. select your folder (just like the step above but the folder instead of zip) location then hit the Zip->Folder button 9. it will take a little but it will dump your entire zip to the folder 10. restart Netham's tool (memory leak issue) 11. In the dump folder look for _preload_section.pre, rename this file to either _!preload_section.pre or _preload_section.bad 12. Go to the cfg folder in the left4dead(1) folder you dumped the zip to 13. Move the cfg1 file and cfg2 file into the folder and overwrite 14. Go back to Netham's tool and hit the three dots after the zip field in the Folder-> catagory and name the file zip0.360.zip 15. Select the folder you dumped to for the folder field and hit the Folder -> Zip button. (will take a little time) 16. Restart Netham's tool 17. Select the new modded zip you just made in the last step in the zip field 18. Go back to wx360 and copy the number that is in the size field Make sure it is the exact same or else you will be wasting a disk! 19. Put that number into the size field, then hit the Pad Zip button (this one will take a lot less time) 20. Now go back to wx360 right click the zip0.360.zip in the left4dead(1) folder and hit replace 21. Select your modded zip replace it 22. Burn the iso 23. Enjoy!