Sounds great, Neo! Though I think no jazz2 changes should be needed to run levels made with this level editor, that would simply suck.

You could also include a tileset recompiler 1.24->1.23. if it has too many tiles, JCS+ can just show a small window like the layer view but then without the layers (lol) which 10 tiles wide and a set number of tiles high, so you can rearrange the tiles in the 1.24 tileset. JCS+ will then generate an 1.23 tileset.

Oh, and what do we need 2048-bit crc, base64 and md5 for? It's just a level project file :/