How I make those things to put my code in?? You know those things that say copy and paste this on ur shop/guild/ect.

You need to be more specific. What exactly are you having trouble with? Copying and pasting or the location of where you place your codes?

This should help...(I think.):
<textarea name="NAME" cols=Put # rows=Put #>Put Ur Code Here!</textarea>

Cols=Width

Rows=Height

Bye, :)