[Koha] how to uninstall koha

I am installing koha3.0 on ubuntu8.10 by following Blazing Moon some of the dependencies like MARC::File::XML,MARC::Charset were not installing and i tried a lot it shows that "Make has some problems,won't install" please help me if u have any idea otherwise inform me that how to remove koha and re install from the beginning -- by kamalakkannan @ kishor