Can I play mustiplayer between my real PSP and PPSSPP?

[frinky]

The premise is simple. I have one PSP and a friend who wants to play some Peace Walker CO-OPS. Will it work?[/font]

[AdamN]

You can search for "pro-online plugin/client for PSP" and installed it on your PSP in order to play with PPSSPP, and on PPSSPP you need to set Port Offset to 0, and both of them need to be set to use the same pro-adhoc server.
You should be able to find the guide on where ever you get the plugin from.

However, not sure whether the game (MGS PW) supported by the plugin or not tho, as there are not many games supported by the old/legacy plugin (nobody tried to improve it's compatibility for years AFAIK)