[hugh]

I can`t really answer your questions directly but I can tell you this.

I have ATV Flash installed. I can stream many different types of files from my PC or mount a NAS drive and stream from that or plug in an external drive. I use it primarily for .avi files.

I use WinSCP to transfer files from my computer to either the ATV main drive or the external drive.

I also have Remote HD app on my iPad so I can have access to my ATV without going and turning on the TV.

Long story short, I think you can do it.

 

[hugh]

No. I use NITO TV. I`ve never tried XBMC because I am quite content with NITO.

 

[hugh]

Maybe mistaken but I believe that a modded Apple TV can see UPnP servers which WHS is so it might be okay as it is.

 

[hugh]

Install the PS3 media server add on for WHS for the times I want to access the NAS on my PS3

If you are transcoding, then you need a lot of horsepower. Are you sure the WHS is up for it?