Undumped CAPS games, how to dump?
 

I have original Amiga disks for

4x4 Off-Road Racing (1988, Epyx) (EU)
Chicago 90 (1989, Microids/Prism Leisure) (EU)

which don't appear on the release list on caps.org
and a stock Amiga 500 w/1MB memory.

How do I dump these and contribute?

I think the easiest way if you don't have the equipment needed is to contact someone in Finland who has, namely Toni Wilen.

I know it's a bit of a late reply (only 12 years!) but you can get a piece of software called Amiga Explorer from Clonato which allows you to connect an Amiga to a PC via Serial to transfer data.