Thanks for the answer but i think that my problem is just a little bit more complicated.
I'm sure that there are already some modules in the ipv4 directory but i want more than those ones. I want to add some modules thanks to my source files.
I have as source files
ip_masq_*: app, autofw, cuseeme, ftp, h323, irc, mfw, mod, portfw, quake, raudio, user, vdolive, icq.
How can i compile them?