I'm not sure of the command line for pcdtoppm, but if you use tcsh as a shell, you could do it in a command line as follows:
foreach pcd (`ls *.pcd|awk 'BEGIN{FS="."}{print $1}'`)
pcdtoppm $pcd.pcd $pcd.jpg.
end
Another option that also will help organize your pictures into digital photo albums is
digiKam. It may be part of Suse 9.3 already, but download a newer version anyways. It will do batch conversions.
