upgrading brakes on a vq statesman

[Big Dog]

i am upgrading the brakes on my vq statesman, it is non ABS, has the standard 15" wheels. i have already bought the twin piston calipers and the front rotors which are EBC 330mm. am buying the back rotors which will be from EBC as well as a friend can get them cheaper for me, not sure what size they are but think they are the next size down from the 330mm.
my question is do i need to buy anything else for all of the above to fit or will it just be a straight swap?

[dattoman1000]

yes
you need brackets to make the caliper fit the strut
some longer hoses might be the go too

and most importantly you need to go buy yourself some bigger wheels

cause the brakes you've just shelled out on don't fit under 15's