To manage your memory cards, you'll first need the utility VMSBrowser, which you can download by clicking here . Extract the file into your chankast directory and start the "vmsbrowser.exe". You'll get to the following screen:
This utility allows you to import save games from popular sites such as GameFAQs into your VMU memory card. Furthermore, you can manage the save states in your existing VMU or fix damaged memory cards (do this at your own risque!).