Guess you could move them into bitparking and trust doublec's monitoring and check point lock in.  

As for a windows client, only current one I know of is  the build at http://www.wuala.com/jbw9/pub/Bitcoin/namecoin/nc0.3.24.61/win32.7z/ , however that has no locked in checkpoints.

I would suggest using Multicoin-exp , as an update to the namecoin config file with a lockin will be coming soon.  You would need to be a bit comfortable using the cli with either of these.
(  http://www.wuala.com/jbw9/pub/Bitcoin/multicoin/MultiCoin-exp/src/ has some *.exe in it for windows built). You would want to make sure you updated to the latest  http://exchange.beertokens.info/docs/multicoin/bitcoin.conf.namecoin  and be ready to either add or update again when a checkpoint gets added.


Maybe Lolcust would be willing to package up his console interface for namecoin usage?