I collect useful PCC scripts in the PCC Script Library. You can peek around
http://phost.de/~stefan/q.html
to see what's available.
If you have written a useful script, you can (and should) submit it there. Just mail it to me <Streu@gmx.de>, and I'll add it to the Library. Library scripts should have a standardized header so I can automatically generate the index with script descriptions. Just look at the scripts which are already there, and make yours look similar.
PCC also comes with two simple sample scripts, `nextturn.q' and `fixtow.q'.