Hello Jorgan,
I used a bootable floppy with cd drivers on it. I installed the cd drivers on the hard drive then shut the laptop down and installed the internal cd-rom drive in place of the floppy drive. The cd I had with Windows98SE was a bootable cd. When the laptop booted up I just installed the OS.
Since you cannot swap drives during a windows session the way to go is to have the cd-rom drive installed internally and use an external floppy drive. They have them on ebay all the time. If you go that way be sure to get the drives for the 760el laptop.
I hope this info is of some help.
Later,
G. A. Williams
WA5EBP@att.net