To install Internet Connection Sharing in Windows 98

Open the Add/Remove Programs Properties dialog box at the Windows Setup tab. 
Click Internet Tools, and then click Details. 
Select Internet Connection Sharing, and then click OK. 
Follow the instructions in the Internet Connection Sharing wizard. 

Notes 
You can also open the Add/Remove Programs Properties dialog box at the Windows Setup tab by clicking Start, pointing to Settings, clicking Control Panel, double-clicking Add/Remove Programs, and then clicking the Windows Setup tab. 
If you used a CD to install Windows, you will be prompted to insert it into your computer. 
To remove Internet Connection Sharing, follow steps one, two and three, above.