Its a common sense install lad. Your 4 metal screws are used around the chipset with the included plastic washers. The plastic screws are used on the outside of the card. Just be easy when bolting the block down and work from inside out so you reduce the flex of the card.
-Dan
Altrought I partially agree with the common sense I also agree with the request ... it would be nice.
I got all my stuff in one box .... nothing was telling me those screws go with those holes and stuff ... damm I don't even know what he is talking about for the plastic bolts ... I never got them