Specific namecoin address in merged mining I want to do merged mining with P2Pool, and I want any generated namecoins to go to a specific namecoin address in my wallet. I haven't seen a way to configure this in P2Pool or namecoind, and Google's turned up no hits. It seems as though it's either too obvious for anybody to mention in any guides, or like I'm the only one who wants to do this. If the latter, then why does nobody want this and why should I not do this?
with p2pool at least for the coins are 'merged' mining you cannot reconfigure them to go to any other account except for the default account of that wallet.  However  you may be able to work around this in one of the following ways depending on your coding ability.
Monitor P2Pool logs and trigger script
Watch the p2pool logs and when a block is found trigger a script.
This can be achieved using swatch (linux tool for watching logs files) and looking for merged blocks that appear in /path/to/p2pool/data/bitcoin/log  (cant find the example merged block right now will edit later to include)  so in this instance what you would do is use this command:  swatch -t /path/to/p2pool/data/bitcoin/log  and create a ~/.swatchrc in your home directory with something like this:
watchfor /SHARE|BLOCK/
    exec echo &quot;P2Pool Event:\n\n$_\n&quot; | python ~/pyPushBullet/pushbullet_cmd.py 6xxxxxxxxxxxxxxxxxxxxxxxx60993c note xxxxxx&quot;P2Pool Notification&quot; &quot;$_&quot;

Im using push bullet to send notifications on share and block notifications.  however in your case you would want to craft a script to check the block itself for merged outputs.
Wallet Notify
Most Crypto Clients now let you configure an action for
  -blocknotify=&lt;cmd&gt;     Execute command when the best block changes (%s in cmd is replaced by block hash)
  -walletnotify=&lt;cmd&gt;    Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)
  -alertnotify=&lt;cmd&gt;     Execute command when a relevant alert is received (%s in cmd is replaced by message)

Courtesy Off The Bitcoin Wiki
again in the same vein as the first optin you could  create a script that is triggered on wallet notify for the Nnamecoin wallet and move the coins from the default addreaa to you chosen address.