Upgrade your nodes and wallet to 2.1, then edit your masternode.conf file and put the reward address and payout percentage on the end of every masternode line.   

If you use the same reward address for all your nodes then the payments are aggregated together so you can't tell which node it came from, but it should make it easier to use the reward amounts because you don't need to select the inputs any more when you want to use them for something.