The information is stored in the Registry. To view it, go to Start > Run and enter "regedit" (without the quotes) in the Open window and click OK. Follow the paths below to locate the Registry information.

You'll find the Win98 equivalent Win.ini MCI Extension settings at:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MCI Extensions

The Win98 equivalent System.ini MCI settings are at:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MCI32