Here's what I referencing from memory in my previous post. It's from: http://www.leog.net/fujp_forum/topic.asp?TOPIC_ID=8575
Should be in the second post on the page:
"Installation via the Desktop PC.
-Mount the hard disk with an adapter into the desktop pc.
-create 2 partitions. Make the C: drive bootable and able to start DOS. Make D: drive copy the files from the installation CD into this drive.
-Remount the disk into the B-Series and start the system. Now you should be able to change to drive D: and start the installation."
Don't know if it works but it's worth a try since there are few or no other options. Also, as mentioned in this link, boot to network is a boot option on at least some B-series LifeBooks, but a network install can be difficult.