Error 8004 can occur if your %TEMP% directory is not set-up properly, if the internal lib library fails to extract the files or if the setup was damanged during download.
So first, I suggest you try downloading the setup again from
http://www.simtel.net/product.php[id]96937[sekid]0[SiteID]simtel.net . If it still fails, please send me an email at mplus@patchou.com .
Thanks.