Some question by a newbie to the emulators worls

hey!

Downloaded the chankast emulator couple of days ago, got some games a program to mount them with and the bios for the chankast. But I cant seem to actually play the game since the keyboard dosent work (only during the games when i try to set the keys up in the options meny it seems to work).

Is there some sort of a keyboard plugin or do i have to get controllers?

p.s

Anyone knows if there is an adapter that allow you to use ps2 joysticks on your pc?