Sure,
You can edit the table if you'd like to, it has a really straight forward structure.
The default location of the index is in C:\Documents and Settings\i025049\Local Settings\Application Data\MyPhotoIndex\Data,
The db contains the following tables:
ImageCategories - holds the list of image categories.
Images - Holds all image data like path, tags and comments.
ImageTags - Holds all tag information like tag name, description and icon.
IndexInfo - some technical information of the index.
SavedQueries - Holds the saved queries data.
What you are looking for is the 'images' table, please don't forget to backup the file before editing it.
There is also the possibility to use the application's API (but that is a little more complex), I hope to publish some samples soon to show how the core component of MyPhotoIndex can be reused to build some useful image indexing utilities.
Regards,
Asaf.