Replace in FILE ...need help

[VBuild_Rookie]

ok I tried it but can't get it to work here is what I got
(^<BuildNumber version=[[^<]]+/>)|(^<DataCenter name=[[^<]]+/>)

then replace with

(?1<BuildNumber version="3.0.0.0")(?2DataCenter name="ha ha")


by the way these are not the only things in the xml file the xml file containts many other lines and the lines above appear a few times under different tags paths...