Fras, I believe the only way you can do this at this point is to do a complete bacup of the 7100, and then you should be able to use this software tool to convert the (*.ipd) backup file and extract the images from it.
Free download ABC Amber BlackBerry Convertor, convert, backup and archive IPD files to CHM, PDF, HTML, Word, Access, Excel, CSV, IPD Extractor
There is not another way that I know of.
Good luck, and welcome to the Forums.