Put your PS2 ISOs in what folder via USBADVANCE/SWAP MAGIC?

I've been speculating about getting a cobra dongle so I can play PS2/PSP ISOs but I rather wait until it can get decrypted first. Well I've decided to use Swap Magic instead and just need help with my question via title of my thread.

Also can somebody provide me with links to the proper Swap Magic disk I need with reasonable prices.

Much Thanks,

R3QU13M