Originally Posted by ozlizard 
Thanks Marc for that information. I presume from what you have said that if I am not printing the photos myself but having then printed via cd or dvd that I would be exporting them in whatever file format I have chosen (most likely tiff)?
Yes - a RAW file is useless to any printer. Even if it hppened to b able to read that format, it wouldn't be able to reproduce whatever processing you had done. In order for your processing to be visible outside of your own processing softeare, you do need to create a conversion. BTW, if you're thinking TIFF because you've heard that JPEG applies compression and loses info, that is true, but unless you're printing posters, it's pretty unlikely you'd ever notice the difference - at leas,t if you use a decently high JPEG quality setting. The advantage being *much* smaller file sizes than TIFF But given that these are just temp files for printing, you can usually delete them when done unelss you expect to print those same pictures again and would rather pay the storage penalty in keeping that copy around than the time penalty in having to regenerate it later. Given that it takes only seconds to regenerate a file for printing, but keeping lots of high resolution files around takes a lot of space, I'd personally just delete them.