>A blow by blow description of how this is accomplished
>on NT 3.51 would be very helpful and very much appreciated.
http://www.microsoft.com/kb/articles/q149/4/26.htm
Works pretty much the same way on 4.0 as well. Editing the registry is a
lot easier than dealing with the goofy graphical interface when you have a
lot of IPs to add (we have over 80).
>Also, is there any known downside to using this method instead
>of installing another NIC.
Sure. You only have the bandwidth of one NIC. ;)