A big thankyou to all for your help and advice.
Great to know your out there.
Well Fran looks like I need a second P.C for rendering if it takes that amount of time.
That s without any soundtrack , still could add the sound track in my video edit program.
Yes I do have WINGS which is easier than Blender for me to use . I thought that after doing the random buildings and deciding the path the camera would take I would then go through and just select which buildings would be in the camera eye and detail them only. Bit like the making of those cowboy flicks, just a facade at the front.This could also cut down on render time,Maybe!
Will go take a look at "City Generator" thanks DeadWarrior.Oh and yes I have DazStudio which works fine with Bryce as I have discovered.A good gateway to importing stuff into Bryce.
Perhaps better make that another two P.Cs cut render time by half!!