.htaccess

Hello

My webhoster has made some changes and now the mscz and xml files are opend direktly by the browser and not downloaded, as before. So I should write a .htaccess file. So I do it like this:

AddType application/x-zip-compressed mscz

The result is ok in firefox, but not so good in InternetExplorer. Can someone tell me, what the better comand for mscz and xml is? What MIME-Type?

greetings
Patrick