@Reyser Okay, I fixed the modkits, and the game still crash. Only this time, it wasn't ERR_SYS_FILELOAD, but ERR_FIL_PACK_3.
Here's another OpenIv.log with the updated data: https://mega.nz/#!BZBVmKoD!JLrh9tkvdyyKas3eszKl5z8bxLCTfG4tGAkxsb-Dtgw
@Willief23 Wouldn't that just mean that the conflicting mod kits wouldn't show up in game, and you'd only be able to modify like three categories on the conflicting vehicles? I've had conflicting ID's before and in those case, the game would still load, but the car parts wouldn't.