mirror features and sweep cut in assembly

Hello everybody,
I have a couple of questions for you SolidWorks gods.

1) Is it possible to mirroring some features inside a SolidWorksassembly?

What I have is an assembly where I need to create some holes. Thoseholes have to be mirrored from a side to the other one of theassembly itself.

2) Is it possible to get a sweep cut in a SW assembly?

Basically I need to create a rectangular cut with an angle. Thisangle needs to be on only two sides of the rectangular shape.
I tried to do it using an extruded cut with the draft functionturned on, but it does not work because it creates a cut with anangle on the whole four sides of the cut.

Are there some tricks that I can use?

Thank You,
FBSolidworksAssemblies