Well, I have three disk on drive g:
under disk1 is having setup.exe
when u run this setup . it gives the source by defualt. we don't have to modify as it is the source for product.
only we can change is the destination of oracle home. I tried it different way's. May be I have to uninstall 9.0.1 then install 9.2 but I am not getting uninstall option as it get's hang, I mean keeps in busy mode of mouse pointer.