I've made a few more changes to the module.

It now allows you to load an image file by its binary data instead of by filename, in case your program already has the binary data in memory.

When fetching a specific tile, you can pass in extra arguments to scale the tile before returning it, for example you can get a tile that is 2X the original size.

I've submitted the module to CPAN, so it will soon show up at: http://search.cpan.org/perldoc?Image::Tileset.