Toni, I just ran across this link, the Haynie Archives, and am posting it here in the event that you find it useful and didn't already know about it:
http://www.thule.no/haynie/
As for the A530, do you see any reason for me to see if it still works? I'm not sure if the A500 I have downstairs still works. As I recall I had a friend install a 2Gb SCSI HD in it about 10 years ago but the drive failed after a couple of years (compare that to the SCSI HD I have in my A4000D which is over 15 years old!)