DOS 3.3 on hard disk?

[bogus.id@istar.NO-JUNK-MAIL.ca (Nick Belner)]

For various obscure reasons I would like to get DOS 3.3 going
on a small (20 meg) SCSI hard drive. Information about how to do
this seems to hard to find; I notice that Nathan Mates has a
tantalizing hint about it in his FAQ:

> As a side note, DOS 3.3 volumes are limited to 400K each; my having
> multiple 400K volumes per disk (same theory as multiple 32MB
> partitions on a HD), patched DOS 3.3s can access up to approx 100MB
> (254 volumes * 400K each) at once. Such patches are not really
> available to the general public to my knowledge, however. 

Could anyone explain how this could be done, or point to the way
to something on-line?

Nathan goes on to say,

> There were a
> few DOS 3.3 patches that let them use 2 400K volumes on a 800K drive,
> though I've never used them.

Ideally I would like the patched DOS 3.3 to access the hard drive
in slot 7, the 143K Unidisk in "slot 6" and the 800K floppy drive
(as 2 400k partitions) in "slot 5".

Nathan also wrote,

> A far better solution is to use DOS 3.3 Launcher. It lets you copy
> unprotected DOS 3.3 140K disks to your hard drive, and run DOS 3.3
> under ProDOS.

The version I found ran under GSOS, not ProDOS.

> DOS 3.3 Launcher is
> available from the normal Apple II ftp sites.

Under what file name? I searched around the Ground site at U. of
Iowa and couldn't find anything like it.

Thanks for any help, 
Nick

ps. Please don't reply to the address above as it's bogus -- I'm
avoiding the email spammers.