No real convenient way to do that without creating a custom item. But to do it with some degree of convenience, you really need v2008. Up until this year, MediaLab was really designed to do just one question at a time. It still is, but at least you have the option now of creating HTML forms like those used in internet surveys and including them in your study (whether they are local or on the web). A sample custom item that assesses demographic characteristics is available here:

www.empirisoft.com/support/showthread.php?t=1091

See also:

www.empirisoft.com/medialab/help/custom_items.htm
www.empirisoft.com/support/forumdisplay.php?f=25