htaccess multiple condition check

[nicky77]

Hi, I am trying to force PDF files to download when the user's browser is IE, but display in the browser for all other cases. I have the PDF download part working, but not sure how to combine this with the browser check. Any ideas? Thanks

This is what I have currently but obviously doesn't combine the conditions

SetEnvIfNoCase User-Agent (Opera|Chrome|Version|Firefox|MSIE)[\/|\s](\d+)\. browser=$1 version=$2
SetEnvIf browser MSIE browser=IE
SetEnvIf Request_URI "\.pdf$" requested_pdf=pdf
Header add Content-Disposition "attachment" env=requested_pdf