Download Internet Explorer 7 Beta 2, here.
I searched for a few days for this version for Windows XP SP2, being the last one released by Microsoft (through April 2006) which does not require the validation of the installation license. In a search "IE 7 Beta 2 download" I found enough results, only that most of the sites that are in the results have a download link to Microsoft where currently can only be downloaded the latest version and it requires a license Windows.
Download Internet Explorer 7 Beta 2 for Windows XP SP2 - >> 11.61 MB (.rar) ;-)