xargs

I don't ever use the xargs command and unfortunately, my bash book
doesn't really cover it and it's really tricky.

What I want to do is to distribute some new files which I put into
/etc/skel to existing users (all users for that matter)...

so I tried...
ls /home > users # so I can edit list
cd /home
cat users > xargs cp /etc/skel/.procmailrc
### didn't work
cp /etc/skel/.procmailrc < xargs users
cp: overwrite `users'?
### clearly didn't work

I've tried a bunch of different things but none seem to be happening...

man xargs is never gonna get through to this thick head

Craig