CHANGING THE DRIVE LETTER OF A CD-ROM DRIVE

The vast majority of Windows 9x computers probably have a single hard disk configured as "C" and a CD-ROM drive configured as "D." "A" is almost universally the first floppy drive. However, if you upgrade a Windows 9x computer by installing a second hard drive, you may want the second hard drive to become "D" and the CD drive shuffled down the list to "E" to keep your hard drive letters in a contiguous order.
Before installing the second hard drive, follow these steps to change the drive letter of your CD-ROM (the steps are identical for Windows 95 and 98):

Click Start | Settings | Control Panel.

Double-click the System applet.

Select the CD drive that you wish to modify from the Device Manager tab and then select Properties.

Look for the Reserved Drive Letters section on the Settings tab.

Set both the Start Drive Letter and End Drive Letter to the desired drive letter (e.g., "E").

OK your changes.

Restart your computer, install your new hard drive, and check the drive letters.