|Some Win98 boot floppies have menu option 1 as "start Windows setup from CD-ROM" others have "start with CD-ROM support". If you have the 1st type, all you have to do is press ENTER & the installation will begin. If you have the 2nd type, the CD-ROM drive letter will be displayed just before stopping at the A:/> prompt. Then you will have to change "A" to the CD-ROM driver letter, then type SETUP & press ENTER.|
As Byro said, the letter designation may be "R" - that's the letter commonly used by the boot floppies available from bootdisk.com. But it may be a different letter...you have to watch for the message on the screen.
The other possibility is that your drive isn't capable of reading CD-RW's. In that case, make a copy to a CD-R & see if that works.