you'll never make the B&M shifter look like "its meant to be there" by trying to incorporate it into the existing console, it wil only end up as a butchered mess unless your very handy with plastic welding etc or know some awesome car interior trimmer that will do it for you and make it look like its "meant to be there" if that makes any sense.
If you must install it, pull the factory console out and just have the b&M sittin on the floor, that would look better than trying to butcher it into the factory console. personally i'd spend the $ on a hi-stall or getting the trans beefed up.
good luck.