after you save a mod in mod creator it will be in CProgram Files\Toribash-2.4\data\mod (you can just copy and paste that)
look for your mod and double click it
(it should open in notepad and if it doesnt right click it and click properties, then in general were it says "Opens with:" click change then highlight note pad, then click ok, then click apply, then click ok...)
look for the body part that you want to add force to
it should be body (ether l for left r for right or nothing because theres only 1)_(the body part)
for example:
body r_leg
body l_hand
body chest
you can only and force to body parts (not joints)
if the body part isnt there just type in the body part you want in the above format and press enter
to go to a different
line...
then type
force 0 0 0 (change these to give that body part force)
x z y
x=(+)left(-)right z=(+)forward(-)back y=(+)up(-)down

for gravity just go to the bottom and (on a new line) type
gravity 0 0 0
under no spasific part of body

=D