Everything seems to work fine in Adobe CameraRAW 4.6 onwards, where Adobe included the *.dng extension that fcam works with. The only exception to this is that the picture metadata is incomplete and only contains (IIRC) ISO and...... Something else..... (!)

CameraRAW 4.6 is included in any Photoshop package from CS3 onwards, don't think CS2 had the RAW image capabilities. Also, the pixel dimensions are not 640 x 480 (307,200pix) as it is 2bytes per pixel, on a 5Mp CMOS, meaning approxiamtely 10,000bytes, leaving you with a 10Meg file. Include into this the remaining metadata etc and you are left with the correct filesize for the *.dng outputs from fcam.

Not sure why it is throwing up errors on the other programs you mention in your previous post but I always have (and probably always will) work(ed) in Photoshop....