This is heavily vibecoded.
I used IDRelocator's (made by crategamesYT) source as a base, but its mostly fully rewritten (by ai). Please go install his mod on curseforge, even if you dont need it. It'll make me feel a little less guilty.
The mod uses a similar method to IDRelocator, which uses ASM to tweak minecraft core and forge to increase max number of global entities from 255 to ~33000. This is basically a port of that exact mod to 1.6.4 with the addition of blockIDs also being handled
It was made solely to make a modpack for an ancient version functional. i have no experience in coding.
If you found this somehow, feel free to use the source, maybe deslopify it!
This project uses an MIT license to match the IDRelocator license

