in my redsteel i have a little circle as crosshair but in many trailers, videos ect. i've seen other crosshairs, how do i change it?

That is probably in earlier versions of the game (while the game itself is still in production). They must have changed it in the final version of the game. I have the player's guide for Red Steel, the people that wrote the player's guide must have used an earlier version of the game because in some pictures in the players guide it had a different symbol when the player is near a door. Plus, in earlier versions of Red Steel did not feature the Tanto (the defensive sword). It must be the earlier version of the game that you are mentioning.

oh, ok, so that also means i got the latest version...

Yes, I did as well.