It may be my machine but getting BT3 on this machine is a pain in the donkey.

I had to put BT3 onto a USB drive then use a WakePup boot floppy and then manually run the \boot\dos\bt3.bat

I used a PQI 1 GB flash drive. I've yet to sucessfully use another flash drive or to get it to boot the CD-ROM. But once it's on there it runs nice!