Try only steps 1 & 2 here: Fixes for Limewire

Also, after that, go to LW's menu bar, Tools>Options>iTunes>Sharing & make sure sharing options are turned off. This option can make LW go slower; ie: use more cpu sources.

Go to Tools>Options>Speed & tick Disable Ultrapeer Capabilites.

Also don't use the Resume button on all incomplete files. This can have side-fx such as affect LW's connection quality. May queue your files for much much longer. This will also stress LW & your comp. (use up heaps more cpu resources.) If you use Resume/Find sources then just apply it to a couple or so at one time.