After a fresh install from an install DVD, I didn't fancy manually downloading and checking all of the updates in /patches added since the DVD ISO had been generated.

'rsync -avpz --progress rsync://rsync.osuosl.org::/slackware/slackware-12.0/patches/packages /home/user/Official-Patches' (All on one line)

This script will synchronise a folder called 'Official-Patches' in the user's home directory with the slackware-12 patches packages on the osuosl.org mirror.

More information: man rsync