Where would we be without the guys and gals over at XDA Developers eh? They have really outdone themselves this time though with the introduction of an App that allows users to swtich between the old and the new Android market.
You will need to have root access to your phone to make these changes but I’m sure you already have that (right?).
Simply install the app > launch it > choose the one you want > reboot and it’s done!
APK Download: Here
Via: XDA Developers