Had setpatch problem myself once on my A1200. I just took the setpatch file from my Deluxe Painmt IV disk, since its AGA comptible..........
Also didn't DP an some other progs/games boot into a WB screen.......... helped me a couple of times when I have had trouble........
and if you really need to read PC disk aren't there other programs than crossdos aviable on Aminet than can do it........
hmm..... maybe I should install my shiny new OS 3.9 myself b4 trying to help other ppl with problems :-)