Unable to install Custom ROM on my Galaxy Mini

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http://forum.xda-developers.com – Hi, Today for the first time i have updated my mini using the Samsung Kies to Android 2.3.6. After that i rooted my phone and then installed CWM recovery However, when i tried to install custom ROM i'm unable to do so. It stops in the first screen itself. Before this i backed up my stock ROM and now when i'm trying to restore it..it got stuck in the Galaxy POP GT-S5570 screen. Please help.. (HowTos)