I've heard that you have to have a decompressor set up to watch videos that you have downloaded from Lime Wire. How do you dop this????? please help.

It just depends on the format that you are downloading, it has nothing to do with limewire. Say, for instance, if you are downloading an avi file, you will need quicktime, an mpeg, well there are numerous players for that. Some formats require a Divx plugin, which can be downloaded on the web, just do a google search. The only thing that would ever need to be decompressed in windows is a zip file.