The skills section will completly depend on your abilities. One thing to consider and many forget about is that there are some manuvers that you have to perform for the FAA CPL that you dont need for the JAA. Lazy 8 and I think Chandels but there may be more. Be careful of the place that sais just 2-5 hrs. Also you will need to take the Instrument if you actually want to use Instrument privilages or for more then 50 NM for hire.
Speaking of for hire...the J-1 issue is another matter. You HAVE to go though a school as they would be sponsoring you. Now wether you qualify depends on interpretations. The rule say you have to be untrained which in some cases is defined as FAA untrained or anything less then a Commercial..then some people say if you have a PPL and 100 hrs then you no longer qualify either but all this is depended on the Immigration official or Embasy employee. Be sure that the school you are applying too has a refund policy for J-1 visa fee if you get denied..they may not have but you have to decide if it is worth the risk.
Good luck all the best...and remember do not go for the cheapest deal..that may cost you the most once things are done...