on the black default theme
The white default theme.
Yeah but as I said I never had it installed before so how do I get it running when I'm on 10.1.0.27E?
If you're talking about how to start it, power on then immediately hold L until static shows on the top screen. If you mean installing it, you'll need a second hax like Browserhax, Ninjhax or Ironhax (Which will only be useful if you actually have the september version) to install it.