Ok, I used this to mod my laptop and it works GREEEEAT!
Instructions: Go ingame so you can see your crosshair
Tape > Pencil dot > stick in middle of crosshair
Yes, thats right, tape. I made my piece of tape VERY small so it wouldnt affect much anything else. Very useful for shotguns mostly.
Thanks for reading
PS: The whole "modding" thing was a joke, so flames gib mi p0w3r b00st.