Desktop: EpsilonPrime, by 0viking0
Sidebar: SysMetrix (top) and Rainlendar (bottom), both using the Future Blue Extended skin.
XP Style: StyleXP, using the NightStar visual style
Icons: Khelek set (used through IconPackager, though not necessary, just download the icon set and rename the .icl to .dll)
That should do it for ya.