First of all.
You will have to complete the full 14 examinations for the groundschool.
If you have a CPL then you need training to test which is decided by the school you choose. You can comlete this by Distance Learning.
The IR then needs to be completed.
The cost is lreally very little less than starting from scratch. You don't say which licence you hold - but if you do not have residency rights in the EU then finding a job will be nigh on impossible.
Hope this helps