Fitting Nokia ck7w into Vectra B

Hi folks,
Newbie to the forum and looking for guidance/info.regarding interfacing a Nokia ck7w handsfree kit with the factory fitted Philips CCR600 radio to enable both auto mute and use of the car speakers instead of the speaker supplied in the Nokia kit.
Has anyone knowledge of the procedure, is a patch lead required?
The audio handbook states that the radio has the facility to interface with a handsfree but reccomends getting it installed by a main dealer-you know the story-anything more than filling up with petrol or blowing the tyres up-take it to a main dealer!!
Any tips on siting the phone cradle, control box & function button, so that (a) I can reach them and (b) I dont kick it when I get into the car would be much appreciated.
The car is a 2000 (Facelift),Vauxhall,Vectra "B",2.5,CDX, Manual transmission.