Neo Geo or Arcade Emulators?

[mango]

Excuse me if this has been already covered, but is there any neo geo emulators or arcade emulators to play Metal Slug?

[MGFox]

The only way to play Metal Slug on the PSP is to use a NeoGeo CD emulator, found HERE (http://psp-news.dcemu.co.uk/neocdpsp.shtml)

Cheers,
Fox