I use XP

and forgot much to do with Win98SE ...but a while a go I copied and pasted this so you might give it a whirl:
Method #1: Manually add the context menu
1. In explorer, open Tools, Folder Options.
2. Select the File Types tab.
3. For Windows XP: Go to NONE / Folder.
4. For Windows 2000: Press n to scroll to the N/A section.
5. For Windows NT/98/95: Press f to scroll to the Folders section.
6. Select the entry labeled Folder
7. For Windows 2000/XP: Press Advanced button.
8. For Windows NT/98/95: Press Edit button.
9. Select New
10. In the action block type "Command Prompt" without the quotes.
11. In the app block type "cmd.exe" without the quotes.
12. Save and exit Folder Options.
Now right click on Start, you should have a new drop down option. Open explorer and right click on a folder, select Command Prompt and a command window opens in that folder.