I'm currently using a PhotoFast CR-5400 with 2 SanDisk Mobile Ultra 16GB microSD cards to create a 32GB MemoryStick Pro Duo card.
It is actually a lot faster than my 8GB, 2GB & 1GB SanDisk Gaming MemoryStick Pro Duo cards.
It is also faster than my 1GB, 4GB, 8GB Sony MemoryStick Pro Duo Mark2...