replaces mtbike.dff and mtbike.txd by default

- 2 versions:
+ IVF version (original lights)
+ San Andreas version (SA lights and dirt)
- All versions adapted to IVF
- San Andreas reflections
- Realistic size
- If replaced by default, no sinking/small wheels in SA-MP/MTA
- Custom .col file
- Fixed R* bugs (model bugs etc)
- Custom handling
- 100% SA-MP/MTA support