Two problems with the post.
1) Apple has never released a G3 minitower, or a G4 minitower. All the desktop G3s and G4s have either been iMacs, desktop G3, or full towers.
2) Your post doesn't state a question or request specific help. I'm glad to hear you're going to try this, but the 'thanks' on the end implies you did want some help on something.
Let us know the result, it's always nice to hear when things work out. Or otherwise, and we'll try to help.