File Paths for Demo's?

When choosing an .mfd file to play under storyboard conditions, it includes all of MY folders in the directory, and won't work on other people's computers. I'm pretty sure apppath$ (is that right?) is the solution but I'm not sure how to use it in this situation. All I need the action to say is "play demo file blahblah.mfd". Any help? Thanks.

Apppath$ + "blahblah.mfd"

And include the file in the same folder as your EXE.

Make sure you select the "Expresion..." button to do this.

Hmm. Is that supposed to get rid of the previous directory and leave the action with only "Play demo file Apppath$+blahblah.mfd"?

Cuz all I've got now is D:\Documentsandsettings\mydocuments\mygames\Apppat h$+blahblah.mfd

EDIT: Didn't see the expression part O_o I'll try that

Argh, now the demo won't even start. I've tried re-writing the expression like 3 different ways. The game.mfa and the demo.mfd are in the same folder too. The demo is called castlespy1.mfd, and I wrote: "Apppath$+castlespy1.mfd" , even without the + or the .mfd and it still won't work. Anyone notice anything wrong?

It Should be
Apppath$+"\castlespy1.mfd"