The 235/40R17 Federal 595RS and/or 595RS-R is recommended by the manufacturer to be fitted to wheels 8.0" - 9.5" wide, so there shouldnt be any problems fitting these tyres to your wheels.
However, they may look a little stretched and will have almost no sidewall flex - ideal fitment for a 17x9.5 would be 245 or 255's.
595RS and 595RS-R's ARE considered semi-slick tyres, not only by the manufacturer but by CAMS (Confederation of Australian Motorsports).
The term "semi-slick" simply means that the tread pattern has a lower void ratio than that of a "normal road tyre".
You are probably suggesting that these tyres arent "R-compound" cut slick tyres - and you would be correct... The 595RS-R is not a race compound tyre, however it has a softer compound than normal road tyres and a reinforced casing that is specifically designed to resist folding under extreme cornering loads - making it perfectly suitable for track use.
I hope this clears up any confusion