First of all - check this database:
http://www.sonido-7.com/d8b/index.html
There's oceans of very valuable information in there.
If you go there, and look at the right side, there's a link to "d8b OS downloads", where you can download images for the OS and the plugins.
You have to download them to a pc with a floppy drive, then run each image (a small program that helps write the floppy disk).
Then you edit that one file on disk 1 of the OS installation, to enable formatting the harddisk during installation.
After installation of OS and Plugins, you probably want to use Munkustraps hack, to enable the 5.1 OS and all plugins.
Check here:
viewtopic.php?f=2&t=1634&start=40#p12374
Alternatively, another guy also made hack - check here:
viewtopic.php?f=2&t=1634&start=150#p15134