compiling modules

[kevin]

I'm fairly new to *BSD, and have one of those newbie questions because I 
can't seem to find the answer elsewhere. I am trying to compile if_de as a 
module instead of into the kernel. I did the upgrade routine, and if_nv gets 
installed as a module, but if_de does not. The only difference that I've 
noticed between the two is that /usr/src/sys/dev/netif/nv has a makefile and 
/usr/src/sys/dev/netif/de doesn't. Is the makefile the reason for this? I 
checked a few files under the /usr/src/sys/* directories, made some changes 
to them and recompiled a few times to no avail.

I am using 1.2-RELEASE.

Thanks,
Kevin