I am going to quote what I told you in the other thread:
http://www.pprune.org/professional-p...ml#post9308050
You don't need to convert your ICAO PPL to obtain an EASA CPL and ME/IR as far as I know.
You can start studying for your ATPL's immediately and then you could attend a CPL-ME/IR right after that.
Look at Bartolini Air in Poland. They're very good. Contact Bartho Blom, he is very useful.