The long time saving issue is important Jamie. It's doing it's noise reduction. Essentially it shoots the shot for say 5 secs as you set it and then it shoots the back of the shutter (Black) for the same amount of time. It then uses the two shots to reduce noise.As for the car park stuff coloured lights are a faf. You know the score with the white balance (shoot something white and use that as a basis for setting it up custome style). Other than that there's not much you can do to combat it. Off camera flash is ace look up the strobist blog as that has loads of useful info.Nick
What camera are you using Shady?