Hi,
You can trick your PC into using an HD disk as DD by sticking a piece of non-transparent tape (like electrical insulation tape) over the HD detect hole. Note that this should only be done for short-term storage.
Also note that an uncompressed ADF file will be more like 900Kb, so you'll probably need to ZIP or LHA it on the PC and then decompress this on the Amiga, or if RAM's a bit short, split the ADF and transfer it in two bits.
- Ali
EDIT: D'oh! AmigaKit was too quick! :-) You're up late!!