ok its titled wrong but you know the way some people have it set that if they press F1 it says hi/goodbye
etc. any ideas?

http://en.lfsmanual.net/wiki/Options

The most important feature however, is the ability to add to the F1 - F8 keys of your own custom messages, such as “Sorry”, Hello, etc for use when in game and too busy to type a reply etc. To do this, select the "F1 to F8" button and in the space next to the selected key, click to open, then type in your message text, click OK to save. There is a limit on length etc, but most short messages can be written.

F1 to F8: Click on the spaces/buttons right to the desired key to define the text to say on hitting the corresponding key. The codes in there are the same as if hitting "T" (to talk) ingame.

CTRL +: Same as behaviour as in "F1 to F8", but defines the actions when hitting CTRL plus the desired key at the same time. Additionally you have access to keys F9 - F12 here.

ALT +: See 'CTRL +', but instead with the ALT key.

where do i go to set them to be different?

Options>>Game>>Type what ya want.