@Beowulf
The easiest way is using an "PCMCIA CD1200-controller",
because you don't have to open the A600 case:
www.amiga-hardware.com/showhardware.cgi?HARDID=524I'm using one with a CDRW-drive on my A630HD and it works great! The power is coming from a cable connected to the disk-drive expansion slot. Make sure you use a heavy power supply like the A500's 4.3A. Instead of a Mitsumi CD drive, you can also use most other IDE-atapi CD/CDRW drives.
Ofcourse, if you use the PCMCIA slot, you can't use it for Fast-Ram or anything else on the same time.
PCMCIA CD1200-controllers are frequently for sale on eBay.
:-)