QUOTE(carl.holmberg @ Nov 16 2009, 01:10 PM)

I have used the guide you posted (xdvdmulleter) to convert wave3 games to wave2, and it worked fine.
I tried the same method with a wave4 game; "Grand Theft Auto Episodes From Liberty City", but it did'nt work.
Any ideas? Thanks for some help
here is the guide i use every time i do a conversion and it works perfectly... this guide is assuming that you have used XBC to create your own legal backup... i typically start at step 6 because i use the same video.iso and pfi files for every conversion (i extracted them a while ago and just reuse them)... the video.iso and pfi files need to come from some wave2 game... also, make sure that all your programs are up to date... with the new wave4, some of the programs had to change in order to add support... good luck and i can verify that these steps do indeed work...
1. Start XDVDMulleter
2. View ISO Details
3. Choose a Wave 2 Game ISO to extract the (PFI) and (Video Partition)
4. Extract PFI and save it to hard disk.
5. Extract Video Partition File and save it to hard disk
6. View ISO Details using the Wave 3/4 ISO - Select [No] When Asked to try and repair unknown Video section.
7. Select (insert video) under the Video Tab - Select [No] When asked Auto Insert Video.
8. Insert the Wave 2 Video Partition that you saved to your hard disk.
9. Extract DMI under the stealth tab to the same place as PFI and Video Partition.
10. Reboot XDVDMulleter and choose Build/Rebuild an ISO
11. Load the Wave 3/4 image and click Next
12. Choose Create a cloned DVD9 ISO and click next
13. Choose Load from source ISO and click next
14. Now choose Load from files and load the (PFI), and (DMI) files you just extracted
15. Click on Make ISO and save it. (the .dvd file will automatically be created)
16. Use NME Associator to convert the iso
17. Burn the ISO using IMGBurn. When burning, select the .dvd file and not the .iso