How about a good shooter for PSP? Is Platypus any good?

[shallowgamer]

I've found Super Stardust to be pretty addicting, so I'll throw a vote in for those.

How import friendly are the Salamander Collection and the Parodius Collection?

Extremely. There's no region protection involved. Just pop it in. And there's no complicated in-game text, or options.

[Scooter]

I couldn't find a copy of the Gradius Collection so I returned Platypus and bought a copy of Namco Arcade Classics (sic). This way I get some good old timey shooters, Galaga and Galexian, along with a few other favorites such as Dig Dug.