Gidday,
first off a friendly RTFM :),
or rather, GTTFW ;)
Linux Printing
No offense meant, but if we [as in the guys that hang
out here and help n00bs] always gave detailed instructions
that would become somewhat tedious ...
As for Slack, you might want to browse the LQ/Slackware
Forum for how to work cups in slack :)
Cheers,
Tink