If it's gone you should be able to d/l and run limewire without any problems. You just have to be careful what type of files you d/l and have anti-virus software running.
www.grisoft.com is a free one thats suppose to be good,
avast! 4 Home Edition FREE Download is another one.
The only type of files I d/l are for audio-mp3, for video-mpg and avi,
I stay away from any exe., zip., wma.,wmv, or anything else I'm not comfortable with.
remember to scan all files you d/l and check the file size, if it's too small don't open it.
Good luck
.