Multiplayer question

Hi i'm new here and also fairly new to the whole hacking and emulation side of PSP, Right now i'm trying to set mine up so i can play Emulators again by upgrading from 1.52 to 2.00. Eversince i bought Gundam Battle Tactics its goodbye DGEN so wasn't happy lol..

Anyways, my problem is. I bought my PSP back when they were first announced and released around Japan/Asis (Surprised mine is free of dead pixels heh..) and it came with Ridge Racer (Jap version) but my friend has a UK released PSP and planning on getting the UK release of Ridge Racer. Will my JAP title be able to play against her UK one?

-MiRaI-101

Anyone..? I kind of need a response quickly.. I know the PSP is regionless but does that include different language versions of games using multiplayer