ed4 on FreeBSD 5.2.1

[Banana Flex]

hello!

i'm a new user of FreeBSD and i have a little problem:
i can not use my PCMCIA Ethernet card on FreeBSD 5.2.1 RC2 on an i386 
platform.

how do i install the ed4 driver? i think is the correct driver
because on FreeBSD 4.9 my PCMCIA Ethernet card was properly detected 
and on  FreeBSD 5.2.1 isn't not working :-(
can i install it from the 4.9 Release? how can i?

what is the good way to make it please?
thanks you very much

Banana