I just spent all day figuring this out...... Check this
link and read it very carefully.... What i figured out was you need to down load
this then install this to edit the tabs... Good luck!
first install hhcv09b 140.zip and install the cab file. If the program does not automaticly downlod and install the application,
then ininstall
HTC.Kaizer.Home.Plugin.with.Tabsetting.schen.cab from the second link above.