Patch for Deus ex game

[deb5877]

I have a premodded ps2 with the mesiah pro and works fine with my backups until I tried the game dues ex. I put the original game in and it said to insert a formatted ps2 disk. The company told me I might need a patch. When I asked for help, he could not give me any info, just to search in ps2 forums. My question is the exactly is a patch for the backup game, how to I obtain it, and how do I put it on my backup game. Someone please help me.: