Okay, I've fixed the Mask issues. All I had to do was rename all .002 files to .000, then the first level was replaced with a custom Medivo Level, but I had to set the Level Positioning so the Next Planet Setting said 4(Guardian, I think), rather than 3(Medivo) or 2(Tubelectric). However, I'm still trying to get my head around how to have it so it thinks Medivo is Planet 1. Do you know how to fix this?