I've put a lot of effort into my installation, which seems to run very well on my Dell Vostro 1500( With the exception of the video being fixed at 1024x768@32.)

I'm still experimenting with various configurations, trying to improve reliability and fix the video issue.

Is there a way that I can create some kind of package that will reinstall everything exactly the way it is now, to ease my re-installations?

You can backup with disk utility, then reinstall and migrate your installation