in your xim managers hip config under keyboard you should see the 4 walking directions
there you set walking to eg north, south, west, east
then below that you will find your button binding options, just bind everything according to your personal preferences there including sprint
then while being in the button binding tab, scroll all the way down
right at the bottom you will see two arrows next to "Primary"
press the button to the right to get into "Secondary"
now you have a fresh button layout, there you assign sprint to north or that button that you use to walk forward
now when you press that button both controller actions will be performed at the very same time
