Compiling is a bit tricky. I don't remember exactly how it goes, but I think it is something like this:
- Delete original DXMTL152b1.u
- Use DXMTL152b1.u from archive DXMTL152b1_compilable.zip
- Compilation should be OK now
- Before playing/testing, swap back to the original DXMTL152b1.u