Is it possible to fix the input lag in Metal Slug Anthology and XX?

[dylstew]

Thanks for the reply. You're right about the shooting, that feels fine. It's just that th d pad and jumping feels of. I'm going to try to change more settings and see what happens.
However, in Megaman Powered Up I don't have this problem at all.

Btw, great emulator, Megaman Powered Up was perfect!

Edit: oooooh, I know what the problem is! The PSP version runs at 30 fps instead of 60, while the Neo Geo version runs at 60. In the menus, the game does run at 60 fps.
Is there some kind of hack that forces 60 fps on the game? I can run it at 60 at double speed, but would there be something that could make it run at 60 at normal speed?