Home Network Connection Sharing and Parental Controls

I'm stumped. I want to set up my home network (5 PC's on an ethernet hub; 4 PC's running Win98 and 1 running W2K) to use one machine to share a dialup internet connection as a gateway router for the other 4 and also provide parental controls (preferably at the connection-sharing machine). I can do the connection sharing with SolidShare (which works perfectly and transparently). I can do the parental controls with Norton Internet Security, though it works at the client and not at the connection-sharing server. The trouble is that I can't do both. NID hoses SolidShare, which the SolidShare support folks acknowledge and don't plan to change.<p>
What I'd like to find out is whether anybody knows of a compatible pair of packages: 1 for connection sharing and 1 for parental controls. Essentially what I want to do is turn the sharing machine into a firewall with connection-sharing and parental control capabilities. If I had to do parental controls at the clients, I could, though it would be better at the server. NIS's parental controls are very flexible and easy to set up, but I need something that works with connection sharing.<p>
Please don't suggest Windows 98 Internet Connection Sharing, since ICS is ugly on Win98 - hard to set up and not transparent for the clients. If you tell me ICS is a lot better on W2K, I guess might be able to use it.<p>
Any suggestions you could make would be greatly appreciated. Thanks.