patch with trainer?!?!?!?

I recently backed up Spyro 3, but because it's copy proteced it needed patched. the patch works ok, but the one i downloaded said it was a trainer and a protection fix. now when i load the backup (i use no mod chip swap trick knife method on ps2) the game plays some strange music and holds at a black screen. then when I press start the intro begins. What is this trainer and does anyone know what the game is doing?