Installation without sysinstall

[Sergey Lukin]

Hi,
I want to install FreeBSD on my old ThinkPad with 12Mb of RAM. I only have
Floppy drive, Compaq WL100 PCMCIA Wifi and 3COM LAN (3CRPAG175)  card.

I tried installing 4.3 as it meets my hardware requirements but
unfortunately the sysinstall is freezing right when it starts. As far as I
understand it requires more RAM to operate so my questions is how can I
install FreeBSD 4.*/5.* without sysinstall?

Note that I'm not Unix guru but am very comfortable with Unix command line
and in somewhat comfortable with FreeBSD in general so will have no problem
making my way though CLI only if I had helpful directions.

I'd highly appreciate any help.

Thank you
Sergey