Buy a Fuel Filter for your corsa B.. Then look at it so you know what your looking for. Then underneath you car down one side will be a fuel pump same as the new one u have bought but muckier. Disconnect this from the fuel line.. with spanner and pliers from the front first.. Then disconnect the fuel line from the back. Then fit new filter push lines back in and tighten again.
EASY PEASY.
Mike
September 2009