Okay, I am looking at the install software on a real Miggy. Docs are typical for an Amiga install in that it doesn't really tell you the entire story. From what I can tell though, looks like the install disk is, for the most part, useful only if you want to get an Atapi CD ROM going. There's also a drawer labeled Expansions which has a BuddhaIDE type device in it, but you usually don't see the expansion drawer being used for anything other than AmigaOS1.3. Maybe it's there for those users. If it is required on 2.04 or better, might want to keep that handy.
The docs do not state specifically what the ?.device should be called, but since it says you "should be able to format the drive with HDToolbox", we can only assume that it uses the standard scsi.device. Good. Well sort of. There's a FindDevice utility on the Buddha install disk if you want to be sure. Run that and see what all pops up. If scsi.device does not work in HDToolBox, it's something else similar to what I mentioned in my first reply. BTW: there's a CD-ROM device that looks to be called buddha_atapi.device, so yeah - confusing? Just a little.
Bottom line: You need your original AmigaOS Install or Workbench disk. That has HDToolbox on it. Yes, it's goofy that the Buddha install disk does not come with such a utility (GVP products usually always have), but that's the way things are in a modern peripheral Amiga world. lol
According to the docs, you should then be able to mount and prep your HD using HDToolBox. After partitioning, saving and resetting, you should THEN be able to install AmigaOS to your new found HD. After that, you may continue to install the software that came with the Buddha.
BTW: you are booting directly off that Buddha install disk, right? That has all the necessary IDE mounting software and such found throughout the necessary folders. You could even try mounting IDE manually by double clicking on its icon found in one of the drawers. But I'm thinking you need to boot into that or your original AmigaOS Install disk first and then go from there. Too bad there's not enough space on your floppy to install HDToolBox. IF you have only a one drive system - have fun! lol