The BSEL mod used in E4000 and 2000 series works in E5200! :)
The problem was the quality of the condutive ink,now I used aluminium foil and now I have 1066Mhz of fsb :)
I hadn't tested the stability of OC, but I can boot at 300mhz, witch result on 3750mhz in E5200 :)
The 12.5 multiplier...