Well a common way of doing it for many fangames of the past was to take your photoshopped image that you wanted to use as the title screen, code some parts of it as turfs, and have the Click() proc call some character creation.

We have the interface file that can handle exactly what you want. If you look up skins in the references, you can find LummoxJR's 4 part tutorial on skins, which handles much more than just login screens. Pretty awesome.