If you can find the author's email, you can ask him to release the source code, telling him the purpose was to port it to other consoles. If not, you seem to be out of luck. By the way, this post had nothing to do with the rest of the topic so in the future you should probably start a new topic.
Jesus, that had a smart AI. One of them set up a weaker enemy as a barrier of sorts, building up to full and then piledriving into me. Have fun coding this game, it should be a good learning experience.
Squidge is busy with SPOT and SquidgeSNES (and possibly SquidgeNgine), so this is a low priority right now I guess (although ROM loading would be nice :) ). I have faith this will be developed when he gets a chance.
Squidge technically couldn't work on the FreeDO port even if he wanted to; he didn't sign the NDA that the developer did to get access to documentation for porting. Completing shadow warrior would be great, I also hope that sound gets added someday.