Yeah. In fact, I think a person reasonably skilled in Photoshop can create a macro/action to batch convert the loading screens. It'd probably involve nothing more than changing the color of the background and frame. If someone were to create such a script for me, I wouldn't mind adding a Dark version.
Hmm. I could never figure out how to automate the creation/saving of the DDS files. Automating the frame conversion is pretty simple with the Actions menu (just record a new action and do a conversion manually, then stop recording). Running the recorded Action over an entire batch of files is also relatively simple with the Automate > Batch or Scripts > Image Processor options but neither seem to be able to handle any automation of the DDS plugin's saving menu. IIRC, last time I tried, Photoshop just stopped me after every file, opened the DDS menu, and wanted me to hit "Save" or whatever button.
Then again, I haven't upgraded to CS5 yet. Maybe that has some better options.