I wrote a simple program to inject/eject a dll to/from another process, given the name of the .dll and the window's name.
I actually wrote it for myself, and I doubt I'll put anymore work into it.
Anyway, here it is:
http://www.valhallalegends.com/iago/Injector.rar
eew, I broke my tab-order.. I'll fix that and repost it :)