Well you have the right idea with how you want it to run, but you need to remember that every time an operating system installs itself (except some linux distros) they want to be the default system booted up. So you need to think of what you will be using most of the time and how you will use it. This will enable you to select the correct order for your install right off the bat.

As for the distro of OS X you are using, I don't think it is a bad one, I simply haven't had any experience with that "flavor" of a system. All OS X 10.5 systems are going to be about the same in order for them to be considered legit systems... what varies is what is included within the install DVD (what applications and utilities are included) and what it allows you to install on (hardware specific... i.e. Intel/AMD, chipsets, graphics). I would do a little digging to find out more about what would line up with your system a little better. Remember that we can tell you what we think is best, but you ultimately are the one installing on YOUR system.

Personally I've found Leo4All to be a good all-around install for both the Intel and AMD sides of the street. People have also said Kalyway is good too. iPC (when his distro is released) will be a great distro for both as well. Look in to your system specs a little more. We need a little more information before we can really "prescribe" what we might think is best for you.

Cheers.

EDIT: what packages DID you install?

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