i have a old ibm 240 thinkpad and would like to install win 2000 but to install all i have is a usb cdrom so when the install inspect my computer part way through it will say there is no mass storage to install from as the cdrom is connected y usb and there would be no drivers so setup can see usb. the thinkpad does not have a floppy drive for me to install third party drivers but i have seen that win 2000 can be installed but how.Thanks in advance for any help.