more, multiple distributions of linux one one machine

Assume the install goes as follows: hdb1,hdb2 .slackware root/swap hdc1 slackware /usr hdc2, hdc3 debian root/swap /etc/lilo.conf has entries for for the two distributions /sbin/lilo > /dev/fd0 boot off /dev/fd0 . the swap partitions for the two distributions How do

install of debian release on system with slackware on it

Currently running slackware 3.4 distribution on a P166 machine with 3 hard drives. drive 1/ nt. drive 2 hdb1, hdb2 slackware root/swap partitions 500meg drive totally used. drive 3 hdc 3 gig, has hdc1 as a linux partition 500 meg, leaviing 2.5gig for debian. I will create a couple of partitions hdc