I haven't tried it yet, but I will shortly hopefully, I have a paper due, and have to get ready for work tomorrow, plus my Room mate is playing Resistance right now...lol.
And the PSP uses the Mem Stick Pro Duo, you are correct.
And you could just use the PSP to transfer the data, also. Right?
It said in the PS3 manual, that in order to store copywrite movies and material on a memory card, it needs to be Memory Stick Pro. However, couldn't you also use a MagicGate Memory Stick Pro Duo? I don't see why the PS3 manual limits the card to a Memory Stick Pro.
EDIT: Here's what the PS3 manual listed...
"The only type of storage media that can be used to move copyright-protected video files is Memory Stick PRO™.
Video files that have been copied or moved to storage media are usually saved in the [VIDEO] , [MP_ROOT] , [MPE_ROOT] or [MLE_ROOT] folder. If the storage media does not contain these folders, they will be created automatically.
Depending on the device in use, some copied files may not be playable.
Depending on the model of PS3™ system in use, an appropriate USB adaptor (not included) may be required to use storage media. Also, when moving video files to Memory Stick PRO™ media, a USB device that supports copyright-protection features such as the PSP™ system or MSAC-US40 (a Sony product) is required.
For some copyright-protected video files, you may not be able to use the Move feature.
Take care not to infringe the intellectual property of others.
Video files cannot be copied or moved during playback.*
* Includes content playback using other features, such as playback of music files."