JAA require that you complete an APPROVED course of Ground training before sitting the CPL or ATPL exams. You need to be signed off by your Chief Ground Instructor before the CAA will enter you in the exams.
Are you looking for someone to help you study or perhaps study with, before attending the approved course? If your trying to avoid attending Ground school you can't unless your converting the same class of licence i.e. CPL CASA to CPL JAA or ATPL CASA to ATPL JAA.