Try step #2 1st. If you can't find .limewire then try step #3. To find limewire, you need to turn on the option to show hidden files & folders before you search. There's a sample image at the bottom of the page.

That sounds odd. Dial up connection thru a university? Are you sure it's dial up?

A modem is the device that connects you to the internet. A dial up modem connects to the telephone line & your computer. You may have an internal modem or external or ...