Ultimate unwrap is what lithunwrap turned into,i agree it is good. But help/tutorials are almost non existant and does have a few problems with selecting and mapping when i use anyway. So smallfish you should try lithunwrap and get to see those tutorials else might seem to you not good value for money .
Edit : Just a thought
Small fish you have extracted files from rar format havent't you,not trying to run from this.If not get 7 zip it unzips and zips most file compression types. Best of all it is free
