What to do with models in .ACT format (old Disney game)

I have a copy of an old Windows game called Mickey Saves the Day: 3D Adventure, and I went digging in the files, and managed to find nearly all the character models as .act files, along with .skl and .scc files (and .bmp textures). I did a lot of Googling, and as far as I can tell, the format isn't used anymore, and heck if I could find any programs that support it that I could still buy or download.

Any ideas how I might convert them to more useable format?