Ok, I'll start by admitting I'm not sure what you're after. If you have an NT terminal server (NT4 TSE, Win2K AS, WinXP Pro) and you want to run a terminal services client on a Win98 machine, there are two approaches:
* Terminal Services Client from the WinXP Pro CD or from the floppy you can make under Win2K AS, or whatever the equivalent procedure was for NT4.0 (can't recall it exactly).
* The Terminal Services Web Client (tsweb, a.k.a. Terminal Services Advanced Client - TSAC). This is an IIS application that installs as virtual directory "tsweb." It delivers an ActiveX-based Terminal Services client over the web for on-demand use on any Win32 machine.
Now if you wanted Win98 to be the host you're out of luck, Terminal Services is an NT technology not supported on the DOS/9x platform.
You can still get some limited remote access of course using Microsoft Netmeeting's Remote Desktop Sharing facility. This offers single-user desktop control of a remote Win32 machine (NT or 9x).
Or you can buy some third-party tool such as PCAnywhere or any of several others. They all add their own features and quirks. I like NetMeeting because... like Internet Explorer you already paid for it when you licensed Windows. In other words, it doesn't cost anything extra.
Hope some (any) of this helps.