Can o2 xda mini OS be upgraded to wm5 (if in the future ms stabilized the operating system) ?

where can i find the original PPC 2002 for the first edition of o2 XDA ?
i accidentally overwrite the ROM with newer OS and now the newer OS is buggy with the unit?

does Sis or the service center at Time square provide this rescue service to my XDA (first bulky version)
sorry for out of topic on xda 1