The iBook G4 can't run Parallels because it is a PowerPC, and not Intel, but it can run these solutions to get Windows to run:
http://www.microsoft.com/mac/products/virtualpc/virtualpc.aspx?pid=virtualpc - which Kurt already mentioned
http://www.openosx.com/wintel/index.html
http://darwine.opendarwin.org/
http://www.iemulator.com/
http://www.kju-app.org/kju/
http://www.lismoresystems.com/ - GuestPC
Mind you, you will need a copy of Windows on CD for all except the WINE solutions. WINE solutions though are not as compatible as the full Windows emulator and virtualization solutions.
The iBook G4 is usually only fast enough to run Windows 2000 or older versions of Windows. If you want to run XP or Vista, you'll want a newer Intel Mac that was released 2006 and later. The Intel solutions are typically virtualization and not emulators. Those have other solutions for running Windows Applications listed here (some are the same as PowerPC, others are not):
http://www.apple.com/macosx/bootcamp/
http://www.parallels.com/en/products/workstation/mac/
http://www.codeweavers.com/products/cxmac/ - a WINE like solution
http://dosbox.sourceforge.net/news.php?show_news=1
http://vmware.rsc02.net/servlet/campaignrespondent?ID=vmwi.1756
http://www.openosx.com/wintel/index.html
http://www.macosxhints.com/article.php?story=2006060201470077
http://www.iemulator.com/
http://www.kju-app.org/kju/
Two programs which will open Windows executible ZIP files are
MacZipit and
Stuffit Expander. If neither can open those ZIP files, then in all likelihood it will need an emulator/virtualization solution above.
I've made a list of software search engines on my
Migrating from 9 to X FAQ* that you can find Mac native equivalent titles to Windows compatible titles.
- * Links to my pages may give me compensation.
Message was edited by: a brody