I'm desperate, someone help. please?!?!?!?!

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Can you please help me? Ok, im really, really, really new at this whole patch business. I'm completly lost too. I just need to know wut a *.bin and a *.cue file is, wut it does, and how i can get it or where i can find one. I mean, i know the rules say im not allowed to ask, but its just that i don't know where to find a .bin file for my game im looking for. I read all of the instructions, i followed all of them, but i just don't know how to get the .bin file for my game. can anyone please help me??? i only want to play 2 games basically, Chrono Cross and Legend Of Mana. I got a ps1 emulator called Epexe (yes that is Epexe and not Ep.exe) Also, my cousin has these two games, but their burned, and I don't have a mod chip for my ps2. (i dont want to get one either because i heard it sortof messes up the system)