you need a program called FONTMONGER...we used to have it at our studio.
it does postscript to truetype and back again....works very well...it was a mac program though, and I'm not sure if it exists for pcs if that's what you're using.
anyway, look into it...or do a bunch of searches for postscrip to truetype conversion...that's exactly what you're talking about, mac to pc isn't exactly correct as macs can use both, just that postscript (mac) is a better font, but that's beside the point really.