here's the stock dialer with changed icon (from 8gb model)--dont know if it will work on 4gb use it on ur own risk
note : root needed
just replace apps in /system/priv-app
change permission 644-64-64
also build.prop tweaks attached
just edit build.prop using build prop editer or es-explorer editer..
copy and paste at the end of line..
i have tested both ..have no issues.....