Может поможет делал на powershell
http://forum.oszone.net/thread-257380.html
Код:

[xml]$text = Get-Content "D:\base64\obr.xml"
$text.CLIENTS.client | Foreach {
$a=" <div align=""center""> "
$b="</div>"
$a
"<br>"+$_.LASTNAME
"<br>"+$_.FIRSTNAME
"<br>"+$_.MIDNAME+"<br>"
"<img src=""data:image/png;base64,"+$_.portrait+""" />"+
"<img src=""data:image/png;base64,"+$_.signature+""" />"
"<br>"
"----------------------------------------"
$b
} |Out-File D:\base64\result.html -encoding Default