How to change lock dialog theme?

[Drink_More_Seltzer]

Hi-

I have searched around a bit for this, and haven't really had any success, so I hoped the forums could help.

I would like to change the lock screen dialog theme. Ideally, I would like to change it something thematically consistent with my login theme. Minimally, I would like to change it something simpler than the default.

It seems that this setting can be changed using configuration editor (or a text editor) to change the "lock_dialog_theme" option in mate-screensaver's config, but I do not know where to get themes, or how to install them (I found some for gnome-screensaver, but these seem to be in the incorrect file format).

Any help that can be provided will be much appreciated!

Thanks!

edit: I should mention this is mint 14, running mate