Quote Originally Posted by sanking
Thanks for the report. I scan ULF negatives with the Microtek 9800XL, immediate predecessor to the 1000XL. I do this in two passes and merge the parts in Photoshop CS.

Does the Photomerge Panoramic program in Photoshop Elements allow you to merge with 16-bit files?

Sandy
The Panaorama Factory supports 16 bit image stitching and is reasonably priced. I've not used it yet but I'm currently ready the product documentation PDF. You can download a trial version from:

http://www.panoramafactory.com/

Unfortunately it appears to be a Windows only product.