Can you make a script that makes the player run by pressing space or any other key

I think you can make this by Common Event called: Running Shoes. When you press key A, B or C, you can increase your speed. (means run)

That's what I heard from friend so you don't need a script.

go to common events.
create a common event, activated by a switch that you make sure is always on.
in this common event:

@> conditional branch: button [R] is pressed. (You can exchange R with any other key. Don't use C or B as these are already used as enter and escape)
@> set move route: [player] change speed (4)
@>else (If it isn't an "else". Edit the conditional branch above and make sure "set handling when conditions doesn't apply" is checked)
@> set move route: [player] change speed (3)
end of branch

Run the game, then press f1 while it's running. Go to the "keyboard" tab and you will be able to change what keys are what.

Well, there's always scripts like ParaDog's Dash script, Moghunter's Advanced Movement and my Eight Directional system. You can even have the graphics change to show a RUNNING character. You can find the scripts here in the forum.

Check the stickied thread called 'The Forum Script Listings' and go down to the MOVEMENT spoiler for movement scripts. I'm sure you'll find these movement scripts that has dash control there