First of all if ur phone is bricked ryt now... i recommend full flash that is Main + FS + Customize.
GDFS: there is nothing wrong with ur GDFS if u backed it up successfully.
(the only thing u should remember is that NEVER use GDFS from another phone! no matter same make/model...)
GPRS: if ur phone tries to connect but couldnt.. use the right customization for ur country.
try and make ur service provider send u the GPRS settings (better than manual settings input as it may avoid mistakes)
please post the log as it helps us to help u!