Searching Custom fields Bridge CS3

Hello

I posted this in the Bridge Scripting forum- but I haven't got an answer so I thought I would post this here- please advise if you can

I created a custom file info dialog box in Bridge CS3 using the audio data 1.txt file located @ C:\Program Files\Common Files\Adobe\XMP\Custom File Info Panels. I just modified the fields in that panel to my own custom fields.

Now I saved as test.txt in the same location as the audio data 1.txt file- and my new custom panel shows up in the metadata panel and I can add values to my custom fields as I would any other. My question is - how do I search these fields as they do not show up in the filter panel- Is it possible to have these fields show up in the filter panel?

Thanks