Well, I used to generate PS files with Classic's "Print to a file" feature, but these days I save to PDF's in OSX. The problem is that I often use several pieces of software to generate a single 'document' (typically Appleworks and some Graphing software (I know that AW does graphs, but I need more flexibility)), so a single paper ends up being maybe 5 pdf files, if I have 4 charts.
So I'm trying to find a cheap way (buying Acrobat for $250 solely for one feature doesn't appeal to me) to concatenate pdf's. The reason I mentioned ps files in the original post is because I have ghostscript, so i can convert between the two, all I need is something that concatenate either ps or pdf.