visual studio 2010 - How to deploy a copied WP7 project without removing the original one -

here problem. made wp7 application. copied project folder of application in order make similar application without having re-write same code.

on copied project, changed assembly information etc.., , modified manifest.

the thing can't deploy copied project on phone without erasing original one. seems copied app replaces original one. there must application identifier change or something, can't find out what/where is.. there way fix this, or have start new project scratch , copy files need?

ps: don't need make class library testing purposes

okay, found out answer. thing modify productid in wmappmanifest.xml file. replace guid (you can generate guid guid.newguid(); ) need modify guid in assembly information. after changing both in copied project, application not replace original 1 anymore