OK..update ...
Since I went back to SP2 on windows XP,have not had one light even try to flicker..been rock solid.."KNOCK ON WOOD"...
I will be installing SP3 in the next day or so,and will let you know what comes of it..
I was having flicker EVERYDAY,and calibration issues everyday..Even when I F-disced about 6 months ago,installed SP3,installed x52,within 24 hours,calibration issues..This time I have waited and no calibration issues what-so-ever...