The main difficulty with adapting the theme to Tiki was to convert it from a fixed-width page design to the fluid width needed to display Tiki's variable-width content. Also, Tiki has many more bundled features than Mambo/Joomla, and these all had to be given the Planetfall look.
Hints for personalizing Planetfall are at Planetfall_customizing, and planetfall.zip, which includes templates, CSS file, and images, can be downloaded here. Please go to the New Themes forum for support and other discussion about this theme.