Hot stuff with elven girls.
Now seriously, that archive contains ALL any graphic editor will want.
For extracting graphics from .dat files use datexplorer.
For browsing tons of .FRM files untill you see the one you need - use Titanium FRM Browser. Could be added via regfile to windows explorer, so it'll recognize .FRM files and will open it on leftclicks.
For editing .FRMs there is Frame Animator.
Usage is simple - you open .FRM needed to be edited, then you save the project in some folder. After that, go into that folder, you'll see project file and .bmp file. Open last one with any graphics editing software you like (I suggest Photoshop, Paint.Net or Gimp), edit it, save. After that, open project file with Frame Animator and then save project as .FRM whereever you want.
Feel free to ask me if help with graphics stuff is needed.