Weird trouble installing YDL 3.0 on a 3400c

[Ted Lemon]

I've been trying to install 3.0 on a 3400c with no luck at all.   I've 
set up a small MacOS 9 partition with BootX and the appropriate kernel 
and ramdisk, and I'm able to get the kernel to boot.   The text 
installer comes up and asks me what language to use, and  I pick 
english.   Then it asks me what kind of keyboard I have, and I pick 
"us".   It then pops up the screen about where to install from, but my 
key mappings are completely hosed at this point - tab and return do 
nothing at all.

Through trial and error I've found that 'r' is tab and the caps lock 
key (no kidding! :') is return, so I've been able to tell it to install 
off the CD-ROM.   Unfortunately, it then tells me that the YDL CD-ROM 
wasn't found.   This is puzzling, because the kernel boot messages 
indicated that it'd successfully probed the CD-ROM, and I do in fact 
have a YDL CD-ROM in the drive.

Has anybody else seen anything like this?   Has anybody gotten a 3400c 
installation of 3.0 to work?