Question: Dual boot Win98 & Win2000

The hard drive is set up with 2 partitions; drive C: is Win98SE and drive D: is Win2000. It is set up with D: as the default boot drive. Here's the boot.ini file:

This PC is no longer going to be used on line, and the owner will use the C: Win98 partition only for running older apps and utils, and office type work. He wants to completely remove Win2000 and use the D: partition for data storage. So I need to remove the Win2000 files, and set up the boot.ini (which is on C: ) to boot to Win98. If this was dual boot with XP and 2000, it would be easy, but I haven't worked with Win98SE in a looong time and I don't want to screw things up...