I'm no expert on the type x games by any means, but afaik the actual exes/files aren't modified in any way.
The type-x loader (or similar program) simply overwrites the memory locations which hold the inputs and the i/o board check. The exes aren't hacked, you just need an extra program to run them. They load exactly like a trainer for a pc game does. That being said, there ARE hacked exes out there (to change the location of the save settings) but the original is included.
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