Using genisoimage:
genisoimage -l -allow-lowercase -allow-multidot -d -D -N -o output.iso -v -V "GAME_NAME" extracted_folder/
Key flags:
For Redump compatibility (2352-byte sectors with ECC):
xorriso -as mkisofs -isohybrid-mbr /usr/lib/ISOHybrid/mbr.bin -pad -boot-load-size 4 -boot-info-table -eltorito-boot default.xbe -no-emul-boot -o redump.iso extracted_folder/
Note: Original Xbox doesn't use El Torito boot – this is for mounting convenience. convert xiso to iso repack
C-Xbox Tool was originally designed to "inject" files into Xbox ISOs, but it is also the best repacker.
Tools needed: C-Xbox Tool v2.06 (or newer), a Windows PC.
Step 1: Prepare your file.
Ensure your input file has the .xiso extension. If it has .iso, don’t worry. Keep it in a folder like C:\XboxGames\. Key flags:
Step 2: Open C-Xbox Tool. Run the executable (no installation required).
Step 3: Load the XISO.
Click File > Open. Select your .xiso file. You will see the internal Xbox file structure (default.xbe, media folders).
Step 4: Initiate the Repack. Do not click "Save as ISO" – that writes a raw dump. Instead: Verify with a hash/checksum.
Step 5: Set the correct parameters. In the build dialog:
Click Build. In 2-5 minutes, you will have a repacked, emulator-ready ISO.