Ive always used newsleecher , but ive just found ultraleecher , which does all the pars and unzipping for you . Your then left with just what you wanted . Seems great.
I tried unzipping feature before peterjohno but I like to save the data in the .rar and pars files because is needed when uploading to trackers. I could always extract when needed but to rar the iso takes way too long.