yes the paper effect is from an action marker and it is simple to do:
1) place an "action marker" down
2) select the marker and go to "edit action", for visual effects select "fx_attach" from the drop down menu under "New Command"
3) then select "fx" to pick which effect you want, and "apply change"
you can also adjust the size of the effect, direction, and other things. To actually do this you will need you game patched to the most recent patch, and you will have to extract the game's fx files from the "WW2Art.sga" and put them at this location:
My Documents\My Games\Company of Heroes\WW2\Data\Art\fx
inside this folder there is a folder called "fx_ambient" that is were the vast majority of the good effects are located.
