Yeah that's right Fisk, well the instructions part - instructions are already included with the pack AND clearly labelled on the web page with nice pics too! The install procedure no longer uses a separate install disk however. All you have to do is boot the HDF file.
Amigauser - You're close. Don't insert the workbench disk until asked to - instead add the System.HDF file to the harddrives tab, save the config and boot without a disk in any of the drives. It'll then boot the System.HDF file and you can follow the onscreen instructions.
Have a read through the instructions linked above and post again if you get stuck - I'll help out if anything isn't clear but it's silly repeating myself. I don't mind if you have any questions.
Or try out AmigaSYS
if you want.