PC things like WINAMP and MS-DOS...?

Hello there... I am from Brazil and my english grammar is quite poor so... take it easy with the jokes.

I really want a PSP but there is some things that I wanna know first...

+ There is a way to have a DESCENT Dos emulator that at least have smooth speed with Tyrian 2000 and maybe Psycho Pinball?

+ I have a Plugin on the winamp from my PC called ENHANCER that is fantastic and it works on my WINAMP 5 and I want to know if there is some way to use full Winamp 5 on PSP.

Thanks!