Re: VBS and HTTP
There are some plugins that might give you what you are after.
PluginAgentinfo can give you the IP address, Browser, and server software.
And PluginSmarty can be used to give you other server and execution environment variables.
This should give you the "http_user_agent":
{smarty name="eval" var="{$smarty.server.HTTP_USER_AGENT}"}
Tom