Give fake permission details to apps on Xperia X10i

Because of the recent update to Google play stores permissions, I wish that as apps can access very personal information, I want to deny permissions to the apps, but as I have heard that this might cause them to crash, I want to give fake data to the apps Eg. IMEI = 0123654789, so that the apps do not crash. I am running the Xperia X10i original stock ROM, rooted. I want to do it without flashing a custom ROM. I appreciate any help.