well now you are talking about something near and dear to my heart.
i *LURVE* the dialog box modifiers, and i could not live without them.
we plan to do a review comparing them soon - there are quite a few now, all of which work slightly differently.
i have seriously considered making my own dialog box modifier, and you are right, that would be the situation where adding such functionality like moving dialogs under cursor could be added.
there are enough cheap dialog box modifiers now that i'm still not sure it pays to make one of my own.. i havent found a free one yet so i guess i have to go investigate dialogmate now
if you have ideas for new features it would be intersting to hear.
i have been using recently filebox extender, which i purchases a license for several years ago, switched away from when it started having trouble with ms office dialogs, and just recently switched back to now that it seems to be working well again.
psHotFolders is also very good.
i like the subtle way filebox extender and pshotfolders add just one tiny icon to upper right with list of favorites.
i use mine not just for the quick favotites but also to expand open/save dialog box sizes and switch always into details mode.
truly i could not live without a dialog box modifier,
and this is one of these things people don't know even exist.
ripe for a donationcoder.com review.. will have to plan one soon