XnView Software

I have a question:

when I add keywords to my camera images with Photoshop CS3,
I believe they are added in XMP data.
The Vista OS can show these keywords directly in the filelist,
also XNVIEW (version 1.94) shows them in the XMP listing.
My question is how to display these XMP keywords
as an overlay in a slideshow ??

Any help or links on this matter is appreciated

René

to give extra info on this matter:
The XMP text says somewhere:

*****************************
</rdf>
</dc>
<dc>
<rdf>
<rdf>beijing</rdf>
</rdf>
</dc>
<dc>
<rdf>

*****************************

Now I want the text-data after <rdf> and before </rdf> ,
in this case the text "beijing" to be displayed on the slideshow.
I have no idea what the rdf and Bag stands for,
I assume this is added when I added the keywords.
Who can give me a clue ??

René