Patching

[FreeFighter]

Hi,

i don't know if i'm on the right place to ask such a question.
It's for my PS2 and PSOne games EURO PAL. The Getaway, SWAT:Global Strike Team, Kingdom Hearts, Stormsled, Harry Potter: And The Pilosopher Stone, Gran Turismo 1, Lara Croft (dunno which one i lend it to a friend)
I have been reading on some sites that you can make your own patches. And most sites that have been making patches seem to be death or something because they don't make any new ones. Because the games i have, there is no patch made for them yet.
The thing is i would like to make them on my own and i've been reading on paradox site to use makeppf with *.bin files and then you create a *.ppf file. The problem is you need the original *.bin file and a touched *.bin file, then compares the 2 to make these *.ppf files. And i've been reading through some of these patch engines on this site, and they do the same. But i don't know what the touched file is could anyone help me out how i can do it? Or tell me which patch engine on this site i can use for it.
And btw is it even posible to play these patched games without using a modchip?