Agreed, but just downloading a DLL to overcome an error is a bad idea, it's better to let some supported package install it.

The better way to resolve this one is to read:

http://support.microsoft.com/kb/326922/en-us

The proposed download the DLL and put it somewhere might actually help in that it may minimize the risk of bit-rot, but it does so at the price of missing security updates. My advice is to deal with the bit-rot and not compromise security in something that's used to administer 900 machines.