Don't type javaw.exe, add the LimeWire directory and jars to the classpath and don't type RunLime.class, just type RunLime:

C:\Progra~1\JavaSoft\JRE\1.3.1\bin\javaw -cp C:\Progra~1\LimeWire;collections.jar;LimeWire.jar RunLime

You'll save your self a lot of typing if you put the JRE in your path, so all your java programs can find it. Then you can type:

javaw -cp C:\Progra~1\LimeWire;collections.jar;LimeWire.jar RunLime

or save it as a .bat file and don't type it in anymore. You could use java instead of javaw, since the batch window will stay up until you close LimeWire, defeating the purpose of using javaw.