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>Thanks Paul, that worked. It didn't like the '/codebase' part of the command, though, because it said I needed a signed assembly. The Delphi program was able to see and use the DLL regardless.

Actually, it just complains about it (but it still works).

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>What are the advantages to signing the assembly? Should this be standard for the installation procedure?
>

That's a huge subject in and of itself. I'm of the opinion that unless you're a provider of third party components or have a specific need, it's not worth the trouble to do it. All it seems to do is create more work with (in my eyes) very little benefit. I'm sure you can easily find a huge number of people who completely disagree with that assessment, though.