Sorry I forgot: Welcome to the board
I think it does not cost anything when you have AMD/ATI card, but it costs 50 or 100$ (per PC) for other cards (aka Nvidia). However it should work in general, but there might be more bugs.
I'm pretty confident they'll help you if they can. However I'm not that shure, if it would run well with openGL, since it's main use is DX. But that is the test periode for
Well I would advise you to try it out (if it's not too much work). You should see if it works right when you have a ... strange picture. Maybe try it out at a LOW resolution, since it's more obvious then.
It seems like you read around a little.
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