Network drivers at Modules Disk ????

Hello everyone. I'm trying to install via network (FTP,NFS,etc) but when i load the drivers for nics at modules disk, i can't find modules for sis900 or NE2000 ISA or .... or ..... or ....., so how do i make a floppy with these modules in??, which files do i need to put in a floppy to be able to load them as necessary when installing??. Thanks. Oxiel.