First, thanks for the great site, and all the help; that which I've read, and hope to receive. My goal is to get advice about what 'solution' is best for me, rather than digging through all the information, I want to explain what I'd like to do, and then be pointed to the pertinant info, or given advice here directly.

Overal Goal:
To simply level 2 characters simultaneously using 2 accounts and 1 PC.

First my specs:
QuadCore 6600, 3GB RAM, 8600GT (256MB), Vista Home Premium, Dual Monitors, 19-inch WideScreen LCD and 17-inch CRT.

What I know:
- In the end I will have to have 2 legal license keys (copies of the game).
- That with Vista Home Premium the Single Video Card should drive two windows with decent FPS (which XP would not, due to acceleration issues on the 2nd monitor). I'm not a graphics snob, so if I have to make some detail adjustments while 2-boxing I will.
- That I can either run 1-installation of the game to spawn each account, or that I can re-install WoW to a 2nd directory (i.e. c:\wow, c:\wow2).

Questions:
1 - Can I use a trial account to set up a new account, and therefore give this a 2 week try?

2 - Will I want KeyClone? I will 'never' run more than 2 accounts. 1 window per each monitor. For just 2 accounts seems like KeyClone would just add complexity....perhaps I'm wrong. * Note: I will not be "dual-leveling" a same class. (i.e. 2-Shamms, or 2-SPriests...etc)

3 - To that end. From those with experience. Am I better leveling 2-toons at the same time, or am I better off Power-leveling one at a time, using my lvl 70 hunter?

4 - Today I usually run WoW on 19-inch, and Thotbott, etc in 17. I assume the best solution for me is to run the 'Alt' character in the smaller monitor. I know I can run the same "install" of WoW twice, but can I do this using separate video settings? (are they account based, or 'install' based)?

5 - Lastly, what are the pro's/cons of using 1 installation of WoW vs 2 installations? Other than managing the WTF common LUAs, is there really a problem with just 1 installation?

Thanks so much for any guidance, suggestions. I hope I was clear on my intent. I really just want a bit of challenge, and more importantly, would like to level my toons a bit faster....that is, make better use of my time.