on the alternative side:
I used to be an avid Pinnacle and Premiere user… but costs on those things were becoming too much for what I was using it for. Still, good stuff… but just a bit expensive to have besides a camera, divegear etc.
This year I switched to Ubuntu for my home PC… and found plenty FREE, LEGAL and GOOD alternatives available. I currently am working with KDENLIVE as my tool of preference. it does HD and almost anything you ask it to do… It looks like VEGAS, I am told, and it is easy to use, I experienced.
If you are not too worried about trying something else, maybe just download a copy of UBUNTU, run it from CD and check if you would be able to work with this OS. Then, if so, create a dual boot pc (the install menu is preconfigured and will allow you to do so very easily) Then, when you are running UBUNTU, download and install the latest version of KDENLIVE and you are ready to go.
It might be worth a try… even the standard out of the box ubuntu has some editor preinstalled, I think.
Cheers,
Maurice