Oops,
Since Microsoft has released IE 5.01 SP1, the link to IEAK has changed: http://download.microsoft.com/download/ie501sp1/Install/5.01_SP1/WIN98/EN-US/ieak5.exe

For further reference, this is THE url to try if the link is broken again: http://www.microsoft.com/windows/ieak/en/download/

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Flavien Scheurer