I never had this problem with ModX.
But seriuosly, I must be going a little bit mad. But it strikes me as being completely ludacrus to allow something as little as a typo in a theme file wreck you entire wordpress install to the point where you need server access to fix it.
Do you know if there are any plug-ins which help or allow you to design themes within wordpress without risking the install?
Thanks Again =D