What Mac OS X version do you have?
If it's not 10.6+, or 64-bit Intel, you won't be able to install Java 6 easily.
I currently have a Mac OS X 10.5.6 (32-bit), and I gave up trying.
You could get vmware, bootcamp, etc if you have a Windows instillation cd.
Or if your tech savvy and have OS X 10.4 or 10.5, try out Soylatte. It lets those users run Java 6.
That's basically it right there. Let me know how it goes, as I want to bot on my laptop as well. =)