You will need at least one bootkernel, and one rootdisk.
GZIP.EXE can be found one directory level up, and RAWRITE.EXE can be
found two directory levels up.

These are bootkernels:

-rw-r--r--    1 volkerdi   248581 Feb  5 01:49 bareboot.gz
-rw-r--r--    1 volkerdi   554060 Feb  5 01:49 cd_boot.gz
-rw-r--r--    1 volkerdi   515248 Feb  5 01:49 net_boot.gz
-rw-r--r--    1 volkerdi   492984 Feb 11 15:15 onlyscsi.gz
-rw-r--r--    1 volkerdi   552381 Feb 11 15:17 scsiboot.gz

These are rootdisks:

-rw-r--r--    1 volkerdi   547130 Feb 15 12:04 color144.gz
-rw-r--r--    1 volkerdi   756441 Feb  5 01:49 tty144.gz

These describe which drivers are included in each bootkernel:

-rw-r--r--    1 volkerdi     3308 Feb 11 15:18 onlyscsi.log
-rw-r--r--    1 volkerdi     2429 Feb  5 01:27 bareboot.log
-rw-r--r--    1 volkerdi     3959 Feb  5 01:29 scsiboot.log
-rw-r--r--    1 volkerdi     3141 Feb  5 01:29 net_boot.log
-rw-r--r--    1 volkerdi     3311 Feb  5 01:27 cd_boot.log