dear mark,
I think it would be a goed idea to ask the same question in the paediatric forum of the www.wcpt.org
I can help a little by suggesting you go to http://whqlibdoc.who.int/hq/1993/WHO_RHB_93.1.pdf as a first step.
Going to google and looking for international parent organisations for children with CP and ... also on the paediatric forum site mentioned above I have listed a number of paediatric neurological sites worth visiting.
Hope this helps you on
I cannot be of much help for you in croatia because I live and work in spain.
esther