I had the same problem with not being able to uninstall LimeShop and it giving me an error while trying to perform the uninstall from the add/remove programs box. I finally managed to get the piece of junk off my system, and I had to edit my registry to do so.
To remove LimeShop from your add/remove programs box, follow this link and instructions: (You will be editing your system's registry with this- be careful!)
http://www.computertips.com/Windows/...9970721002.htm
To remove the LimeShop element that has been added to your Internet Explorer's right-click menu, follow this link and instructions: (Again you will be editing the registry- be careful)
http://www.pcmag.com/article2/0,4149,911422,00.asp
For the rest of the LimeShop stuff, just delete its folder in your program files folder, and wherever else you see LimeShop.
And you can trust in the fact that I will NEVER download LimeWire again!