I need help to patch

[shadow/cruiser]

Hello I'm trying to patch a psx game called crash bash I've used cdrwin to create the cd image to my hard drive I also downloaded the patch from megagames I have the following on my hard drive crashbash.bin, crashbash.cue, crashbash1.p4u the patch that i downloaded was DHI 2100 how do I add this patch I dont know if it is a ppf or pdx, or rsp. I would really appreciate any help thanks
The Shadow