Q1 - The attached screenshot is what I see for a CreativeLabs webcam when I call the 'IMAQ USB PropertyPage.vi' and the the setting input is changed to 'Video Settings'.
Q2 - You might want to check out
IDS cameras - they have machine vision quality USB cameras that have DirectShow compatibility. I have never tested their cameras with our driver, however, if they support DirectShow, they should work fine.
Q3 - It shouldn't make a difference either Win 2000 or Win XP. I would make sure that you have the latest
DirectX driver installed either way.
Q4 - All I know is that it is being considered.
Hopefully that helps out! Good luck with your projects!