Hey all I created a mining tutorial originally for ronpaulcoin (RPC) but I think it could be used with practically any scrypt based coin. Oh, and it has pictures to make things easier for the newbies! Check it out:
http://ronpaulcoinhelp.webs.com/mining-guide If you have any improvements you would add to it let me know (I am considering doing one for cudaminer once I get access to an AMD).
Your tutorial bypasses the proxy, there is no reason to use it in the setup you have outlined.
Now you may want to use it to control all local miners to one pool and or wallet. That would be a tutorial that would be helpful.