Id like to welcome you to amiga.org. :-D
Copying over the disk to the harddrive would be a great way of booting it from the harddrive, and just copy over all of the files from the other disks. But one problem that stands out is when you go to put in some bigger internal harddrive, then the install disk had the HDToolbox to prepare it. Maybe the 3.0 WB disk already has it?? :-?