I would recommend Amiga Explorer for this sort of thing. Although it's not free, it's by far the easiest software for pc - amiga transfer that I've used. I was putting a HD in my A600 a while ago and wanted to put it on there, but with only 1 mb ram (it's got 2mb now :-P) I couldn't transfer it to ram, so instead of that, I just ignored AExplorer's instructions and transferred it directly to the hard drive. Works a treat, and I'm sure it would work if you changed RAM: in the transfer command to DF0: and worked from there.
Plus, it's great because it's basically one-click adf writing. Just drag the adf onto the empty disk icon in AExplorer, and you're done.
