Thanks everyone for the helpful responses, suggestions and explanations. I watched one of the online "how to" videos on the OWC site and I think I can handle installing an *internal* second drive. With my current budget, going the "slave" route is what I will do, and NOT get the PCI card (is that what it's called?) in addition, that would allow me to have the better/faster new internal 2nd drive (the "S" ATA one?) (All of this tech language is still new to me, sorry if I am butchering it as I probably am...) For now, anything will be an improvement. And I may ultimately get an external FW drive (enclosure that I "put together" myself, probably) - to use for backing up files for BOTH my G4 Sawtooth desktop AND my iBook G4 laptop. The video I saw online isn't exactly what I'll need to follow, as that one was for a G4 but was NOT for the "slave" type... this video showed you also getting a new PCI "card". But it didn't look incredibly difficult, and I'm assuming that the new drive will come with clear installation instructions (or I can search online, or ask all of you, haha). Thanks again and I'll let you know next week how it goes. It should arrive early in the week. Take care, Michelle