depolying an external assembly (C#) in GAC

I'm using an external assembly on a scripting fucntoid, when I try yo test the map I get an error, saying that the C# project cannot be invoked, because it's not in GAC!

On the 2006 version, I just have to copy the dll file from the bin folder do the assembly folder (c:\windows\assembly), but if I try to do that I get an error that it's not strongnamed!

My Biztalk project is strong named, but how do I do this on the C# project?

Thanks in avance!