If you are going to convert high-poly models for use in games, contact the creator of the model. You sound like you didn't model it yourself and I'm not sure how the creator would feel about you derezzing their work and then distributing it. I would take the advise given to you before and start over from scratch. It is A LOT of work to derez a figure. If you use a script or program to do it, it will do a sloppy job and that would reflect poorly on you. Then you would have to fix it up, which would take as long as just starting from scratch.