Hello Lyne.
I think you will get better performance configuration wise if you run XP 64 pro on your 64 bit hardware rather than a 32bit os version.  And if you put a 64 bit version of XP then might as well run with a total of 4 gigs ram (if your bios supports it)  since the 64 bit os can make use of it.  Especially since Vue 6 is 64 bit.  Myself, I am using an AMD Athlon FX 60 Dual Core with 4 gigs fast corseair ram, Asus A8N32-SLI Deluxe motherboard, Nvidia Quadro 3450, and 500 gigs of raid 0 SATA.  This was a pricey config in the late part of 2005 but it runs very well. 

For better Open GL support I think you have to have a video card that says it is an Open GL card.  I use an NVidia Quadro 3450.  I'm not sure about the other NVidias that are high end game machines; those ones talk a lot about direct x support but not sure about open GL.

Unfortunately, even with all this in place I'd have to say that the pre-release version of Vue 6, which is the only version available now, is simply not production ready.  I think they released it just to let some of us see what it can or might do.  I have been able to get some really good images out of it and I can tell the rendering is better.  However, my success is only partial as I have several projects I had to move back to Vue 5 because Vue 6 would not handle.  But the ones Vue 6 did do worked well.

I think Vue 6 is going to be a very good product when the final commercial release is ready and so is worth waiting for.  I just wish we did not get the tease release first.  It should of been labeled as beta still.