If you like Windows 7 , but you like the Vista Style , then this theme fulfills your wish.. You can check the preview it looks exact as vista.. so thanks to the artist of this theme ~fediafedia .
Light Celestica Beta is another light theme made by Deviantart artist ~sergiogarcia9 , with small rounded style caption buttons ( close-minimize-maximize buttons ).
NOTE : This Theme includes explorerframe.dll for Windows 7 ServicePack 1, so if u have only windows 7 , then don't replace it...If you do so , then please maake a backup...