"Remote" upgrade from 7.1 to 7.2

Dear all, Can anyone suggest a way (or know any pointer or success story) that can upgrade and existing SuSE 7.1 host to 7.2 "remotely" ? In here, "remotely" means that I cannot have access to its CD-ROM drive nor floppy drive to insert anything there. I can telnet, ftp and whatever to that machine, but just not physical access. I am thinking of a stupid way to do so, by getting a current 7.2 machine (with the same hardware configuration) and generate a disk image file from the hard disk, then ftp to that machine and overwrite the whole hard disk. Is there some better way to do so ? Regards, Raymond.