Looking for script for raw/unusual image data

[dfar80]

Hi. Once in a while I dabble in game modifications, which invariably means texture or sprite editing, usually with very specific tools for very specific file and/or compression types. For the most part I can work out the kinks in files, which can have a single image split into pieces or various images placed inside the same file, but sometimes I come across image formatting which that makes edition tricky.

Recently I came across a game I would like to modify but its image structure - at least when viewed from programs normally used for editing this kind of thing - limits functionality. Pictured below is the image data, partially seen from two different programs:


(Seen through a program called Tile Molester)



(Seen through a program called Texture Finder v2.1)


The image, at least according to the first program, uses 2 Dimensional tiling @ 16bpp RGB modes (it can also be seen at 15bpp). The first program allows editing while the second one doesn't. It is possible with the first one to export as, say, *.png and edit the image through other means, but importing doesn't always work as it can corrupt alpha channels and palettes. And directly editing an image, or series of images like this through the program is a chore.

Further, this one lacks any kind of header, making it harder for some programs to recognize it.

I'd like to know if there is any kind of GIMP extension that would open raw data from a file which definitely contains one or several images inside it, while at the same time preserving the integrity of its palettes and alpha channels.

Thanks in advance

PS: I'm including a link to the file (the forums won't let me attach it) if anyone wants to look into its structure, since the game has multiple files/images like this:

http://s000.tinyupload.com/index.php?fil...3007020139

EDIT:
If you download the file above, you can run it through this site and see it in full, along with getting an idea of how it's structured.