The Marine Flamer model is a geoset merge of the Chaose Space Orc and the Terran Marine. I also removed the spikes behind the Orc's head. It's compatible with any skin that works on the WC3 marine model.
To change the path first find Yogbul's File Converter, convert the .mdx to a .mdl, then look for the materials sections and change the path "Units\Critters\Marine\spacemarine.blp" to the path of the skin you intend to use. Convert the .mdl back to a .mdx, import it and the skin into your map, then you're done. Easy, eh?
Credit goes to Blizzard for the base models, I just stuck 'em together.
Keywords:
terran marine