I put the VFR bars on mine and didn't have to put longer hoses on.
But i did have to remove the cables from their retainers and dremel some tabs off to get them to fit properly.
I know this won't help in getting the screw out now, but when you go to install it nexxt time put some white lithium gresae on the threads first?
Did you try 3 in 1 oil and let it soak in???
Remember i made a post a whils back about the Siler stars or what ever they are and the lady there talked me out of them. SHE told ME not to buy them because if you put a lot of miles on your bike they'll last around 6 months.