Modelling: Lighting

Here's a few renders of a bit of my city scene at different lighting settings, I based it in London, varying it up by changing the time of year and day:

Should have uploaded these things a few days ago, unfortuantly the wireless device on my laptop has broken so it's been a bit of a delay. If any of you guys have vista and you download SP2 let me know if it breaks your wireless please? Cheers.