The v200 firmware for the E71 packs in 4 brand new themes (Black Personal, Black Business, Red Personal, and Red Business). Unfortunately, it also breaks HelloCarbide. This left users with a choice between cool new themes and full control of the phone.
Until now: the third option is here. I obtained all the files for the new themes (partly with the help of Phantom Lord) and packed each of them into a convenient .sis file. It should be possible to install them onto any S60 3.x phone (including unhacked ones) as long as the installation options are set to allow unsigned packages. However, they might not look very good on non-landscape phones (i.e. anything other than the E61/E71).
These themes come with no warranty, express or implied, and I am definitely
not responsible if this thing totals your car and burns down your apartment.