some help with changing storage of thumb images

[bitstomper]

Hi,

Can not get my head around how the thumb images are stored.
I need to insert a new row into dbase for each created thumbnail.
Now thumbnails are stored in table media.
The only code I can find which does this is in the function displayMediaThumb().
However, this is only executed if file_url_thumb is empty.
Editing this has no effect so changing the dbase field file_url_thumb is done elsewhere, but I can not figure out where and how.

Can anyone point me in the right direction?

Thanks