-delete old versions of powerdigi and reset twice
-install the appropriate version of powerdigi
-calibrate it
-enjoy

which version is right for me?

 PowerDiGi_320.prc: T|C,Treo650,Treo700p,Treo680,Treo755p,TG50
 PowerDiGi_440.prc: T|E,T|E2,T|T,T|T2,Zire71,Zire72,TJ24,TJ27,
                    TJ35,TJ37
 PowerDiGi_480.prc: iQue3200,iQue3200a,iQue3600,T|T3,T|T5,LifeDrive,
                    T|X,TH55,Zodiac
 