After a bit of research I can confirm that ACR does not yet support D2Xs, apparently the file format is identical to the supported D2X but there is a metatag stating the origin of the file is from D2Xs. I am sure ACR is getting better but once is was frowned upon. I have tried Bibble, Capture One, RAW Shooter Essentials (RSE) and NX and I find the output from NX sharper with better colours especially skin tones. There is no conflict between Photoshop CS2 but possibily an overlap in features. I only use photoshop to resize and sharpen everything else is performed with NX.
We have a discussion about NX, link below.
http://www.worldphotographyforum.com...ead.php?t=1341