I can see you spent a lot of time making custom icons as well -- I'll probably make a few too.
One thing to warn you - this work might become obsolete! WinGP will take icons directly from the FXE files themselves, instead of needing custom icons. Backgrounds are still great though.
Rico is right.. you need a scripted backend (just like the AtariST Compatibility site I built - View Here) It would save your butt a lot of time in the long run.. And I don't know much about WinGP (cept that I am eagerly waiting for it ) But as far as I know, Guyfawkes has it on hold for a while.
And also a host that doesn't throw up pop-ups
Scripting - Basically making the backend so you don't have to put in the html everytime when you add new icons/backgrounds.. something to that effect.. Some automation.