Look here - http://memorycoin.montaxx.me/howto.php

How to extract ProtoShares-qt Private Key

To get your Private Key you have to start your wallet first.

Now click on Help and choose Debug window.

Now here we change to the tab Console and type in: walletpassphrase "YOUR WALLET PASSWORD" 600

And after that: dumpprivkey YourPTSAddress

Now your Private key will be shown.

Importing Private Key to MemoryCoin Wallet

Now download the MemoryCoin Wallet from the Downloads section and fire it up.

Here you need to go to the Debug Console again.

Now type in: importprivkey YourPrivKey and you should get your first MMC.