You probably shouldn't try to move the individual files after installing them; there are two Holiday Lights-related files in your Windows directory that are easy to miss (and the uncompressed files won't all fit on a floppy disk, anyway).

Instead, just download a fresh copy of the setup program from our Web site and run it on the new computer, then type your existing serial number if you're a paid user. That will guarantee that you have everything you need and that you have the latest version.

If you don't yet have Web or America Online access on your new computer, you can download the setup program onto the first computer, copy it onto a floppy disk (the file you want is named "HLSetup" or "HLSetup.exe"), then use that floppy disk to install it on the new computer.

 
See also:
How do I upgrade if I'm using a previous version? (This page explains how to download the setup program.)