Well,i'm assuming your already on custom firmware since you aren't new around here
But anyways, you place the eboot and keys inside a folder (can name it anything) and that folder goes inside your game folder...if you have a custom opening_plugin.rco then you'll have to use my tutorial in the master guide for re-enabling psx emulation. I'm sure you know how to do it without the use of pspfiler, but if you get lost just post back here and i'll run you through it.