Help, need "Dummy" guide to modding

[dummy]

I created a shortcut and tried adding that
-tilegen, it didn't work. What a, I doing wrong?

I see no place that says "command line"- what is a command line?

There is a "target" line which contains the location of the exe file. I try adding the -tilegen to that, and it says that no such target exsists..

Help!