Quick Questions

I have a basic fps engine going at the mo but cant seem to make "collectables" is it possble to like leave a sprite near the floor(medipak) and make the player pick it up as he goes over it? being trying but best i got was that the player got stuck next to it (sliding).

And whats the best way to create windows in a building any ideas, i have cs4 but i prefer maplet.

any help would be appreciated.

thanks