Getting SNES cheats to work

[gensym]

- Debugger (which one, how to use it)

Most emulators have one included. For example, PCSX provides an extensive debugging interface.

- Differential search (huh? never heard of that)
- Interesting adresses (no idea which adresses could be interesting)
- Poke adresses or freeze them (drive this aeroplane to NY. Sounds easy enough so everybody can do it)

For example: http://forum.cheatengine.org/viewtopic.php?t=18163

- Write breakpoint (hey, 10year old john, can you repair the car?)
You shouldn't think that people have your knowledge.

That is pretty basic knowledge. All newbies in start romhacking from hexeditor, debugger and diff-search. More advanced topics are full program decompilation, if you want to get full source code for your Final Fantasy Tactics.