Instructions
Connect your PSP to your computer with the USB cable. Place the PSP into USB mode by selecting "USB Settings" from the Settings menu on the XMB dashboard.
Locate the PSP Memory Stick icon in "My Computer" and open it to find the VIDEO folder. Mac users will find the icon on their desktop.
Select the "Dragon Ball Z" episodes you want to transfer and drag them from their location on your computer to the VIDEO folder in the Memory Stick window. Keep in mind that an average episode of "Dragon Ball Z" is approximately 175 to 200 MB in size.
Disconnect the PSP from your computer when the transfer is complete. You can view the episodes by accessing the memory stick icon from the Video menu on the XMB dashboard.