Hi JaviCerva/Jedive!
Unfortunately, I managed to lose the source code to Maplet shortly after finishing it so I have no idea how it works any more.
Probably possible to hack the file format but unlikely to be easy. But knowing early 2000's me, it's likely to use an 'IFF' style file format, eg: chunktag/chunksize/chunkdata...etc etc, where chunk tag is a fourcc 'character code' like 'LIGT', 'PRIM' etc Just guessing really though!