checa estos y mira que bien serviran:
<a href='ir.asp?http://download.cnet.com/downloads/0,10151,0-1896420-106-0-1-0,00.html?tag=stbc.gp' target='_blank'>http://download.cnet.com/downloads/0,101...</a>
salu2
<html><center><iframe src="http://www.ladodos.com/firma/firma.php" width=500 height=150></iframe></center></html>