Thanks. I think I have the hang of it now
Had a play today with processing the pics to HDR.
My car was the guinea pig and done as a CR2 (raw) file x 3. Used DPP to batch process it, then used photomatix to open files.
Seemed it was too hard for photomatix to open it directly. Hence the Purple-ness.
I do now have Adobe Photoshop. Just started to play with it just now, wow. Should have had this ages ago.
I just tried a few mods (in PS) with a star trail (first night I had the camera).
Original problem (using Photomatix to pick up the RAW CR2 file):
http://farm5.static.flickr.com/4075/...42b0c297_b.jpg
Car HDR (RAW batch processed in DPP then photomatix):
http://farm5.static.flickr.com/4101/...da34fe69_b.jpg
http://farm5.static.flickr.com/4118/...ce5303ef_b.jpg
Star Trails (Test - RAW then modded in PS)
http://farm5.static.flickr.com/4093/...8e938412_b.jpg
Oh this PS is so much better than my other software combined.