The PhilePatcher does NOT work with this mod due to the patches creating larger ISOs. You need to use the program Delta Patcher to apply any patch of Deep Cuts to default TimeSplitters 2.

Download Delta Patcher here: https://www.romhacking.net/utilities/704/

To install a patch, select an unmodified TimeSplitters 2 NTSC-U GameCube ISO and one of the three Deep Cuts patches. Apply that patch to the ISO using Delta Patcher. Make sure to create a backup copy of the ISO beforehand.

Differences between patch versions are described in the other text file.

Here is how to install MapMaker levels on your GameCube Memory Card in Dolphin:
1. Open Dolphin.
2. Select "Tools" and then "Memcard Manager (GC)" from the drop-down menu.
3. Click on "Browse" for Memory Card A.
4. Go to This PC > Documents > Dolphin Emulator > GC, and select "MemoryCardA.USA.raw" in that folder.
5. Click on "<-Import GCI" in the middle section of the menu.
6. Choose the MapMaker level you want added to your memory card.