Just so you have it for future reference, here are some of those reg hacks and
here is where you can find more
Remove Wireless Manager, Power Icons & Screen Rotation from System Tray
HKEY_LOCAL_MACHINE\Services\WirelessMgr
DWord: Keep Set Value: 0 0x0(0)
HKEY_LOCAL_MACHINE\Services\Power
DWord: ShowIcon Set Value: 0 0x0(0)
HKEY_LOCAL_MACHINE\Services\WirelessMgr
DWord: ShowIcon Set Value: 0 0x0(0)