I don't have any experience on this, but i have just installed the firewire port on my soundcard, so i at least have some useful links
.
If you're using the normal slack kernel (i assume 9.0) then firewire (ieee1394) support is there as kernel modules, which you have to manually load. First check it's there: modinfo ieee1394 as root.
Then load it, modprobe ieee1394 (again as root)
I think you'll then need modprobe ohci1394, then modprobe video1394 .
However, you'd do best to check
here and make sure. There are also links for software at the bottom of the video page.
Good luck!