By request, here are more explicit steps I used for SlackFTP
1. insert Boot Disk and power on system.
2. when prompted, insert Install Disk 1
3. when prompted, insert SlackFTP install 2
4.login as root
5.type pcmcia
6.insert pcmcia disk
7.press enter to load disk
8.press enter to unload disk
9.type network
10. insert network disk
11. press enter to autoprobe for all types of network cards.
12. if card is found continue to 13, otherwise, insert a new card and repeat 11.
13. press f to load the FTP module
14. press enter to unload disk
15. continue on to setup to add your swap and configure your disk.
16. when it comes to select your media, you have a lovely install from
an FTP server option(4). Yay!
17. Setup your IP address(I think DHCP works here), subnet mask,
gateway(optional)
18. specify ip address/install dir of FTP install source.
19. Read output after system attempts to mount FTP drive. if
successful, press n for no more attempts to setup FTP and continue.
The rest is like any other Slackware install.