The question is: Who is your issuing CAA?
You have a JAA-licence and you´r flying in Europe-so it is a european?
Or are you american (because you mentioned LASORS)?
According to JAA-countries, you cannot go and decide to log PICUS-hours.
The company you are flying for need to have a PICUS-program you are participating; then you can log PICUS-hours (under special circumstances), and these hours need to be counter-signed (not primarily in your log book, but the company is obliged to produce a valid document with the Captains signature and store it for years)...