Well this is sad, we have one thread and 2 unrelated questions... it would have been better to have two threads here.
To answer the "old" primary question of Michiel.
I'm quite curious... you seem to not know the product (CMOD) with your question, and still you want to go away from CMOD for some internal reasons...
CMOD is an archive system, and for that it is one of the best product in the market. If you need a DMS system, or any kind of other functionality, then of course CMOD is NOT the correct tool for it.
Now to your main question To convert AFP to PDF. You have the tool (you need to have the license for it) AFP2WEB, which contains all the PDF conversion that you need. It is fast and good.
You also have Docbridge Mill, Assentis, ISIS Papyrus, OPUS, etc... to name a few. there are tons of tools to do it. None are freeware as much I know c(if someone know one, I'm interested!!)
@Frederik: No you cannot integrate Infoprint as you do with XENOS, you need to write your own indexer with Infoprint tools and generate an generic index file.
Sincerely yours,
Alessandro