I'm pretty sure I can't, but is there any chance I could use the DVD StudioPro on a PC computer? If not, does anyone know of a software that is just as good for PC?
If it's a newer (like 2-3 years old) model, then yes [NON HD content]. If you're worried about HD, none of the G4 model computers (laptop or desktop) according to Apple's specs can handle it (G5 only)
Minimum System Requirements
Macintosh computer with a 733MHz or faster PowerPC G4 or G5 processor
AGP or PCI Express graphics card
8MB of video memory (32MB recommended)
Mac OS X v10.3.9
QuickTime 7.0 or later
[*] 512MB of RAM (1GB recommended)
[*] 4.4GB available disk space
[*] DVD drive for installation