Normally in JARLand if you are a JARLand resident you can fly other JARLand aircraft on a licence issued under JAR FCL 2.
However I am pretty sure that your validation would only be applicable to an aircraft registered with the member country that issued the validation and possibly only within that country.
It can be a long process but it is not impossible.
Try opening the can with the following example which I have been through - note that it is Swiss. The member states requirements may vary.
FCL 2.015 has the info.
Requirements for the issuance of a Swiss validation certificate CPL(H) VFR single pilot type rating helicopter issued on the basis of a valid ICAO-CPL(H) VFR single pilot type rating helicopter issued in a non-JAA-state.
1/ JAR FCL class 1 medical certificate issued by an authorised Swiss FOCA AMC.
2/ Demonstrate to the satisfaction of the Authority that knowledge of the relevant parts of JAR-OPS 3 and JAR-FCL 2 (see AMC FCL 2.005 & 2.015) has been acquired.
3/ Proof of the radiotelephony qualification entered in the foreign pilot’s licence or equivalent document.
4/ Proof of the language proficiency (at least Level 4) entered in the foreign pilot's licence (if not demonstrated, the rights of the licence holder will be restricted according to AIC B 003/08).
5/ Minimum total flying hours experience in helicopter:
700 hours in helicopters other than those certificated under JAR-27/29, including 200 hours in the activity role for which validation is sought, and 50 hours in that role in the last 12 months.
6/Complete, as a skill test VFR with examiner on single pilot type rating helicopter, revalidation requirements relevant to the privileges of the licence held (might be combined with a skill test IR single pilot type rating helicopter) in accordance with JAR-FCL 2.245 and ‘FOCA Guide
7/ Application for the issuance of a pilot’s licence/permit (FOCA Form.60.975)
8/ Copies of all pages of the current foreign pilot’s licence with entry of the required current single pilot type rating (pending licence is not accepted)
9/ Copies of all pages of the corresponding valid foreign medical certificate
10/ Copies of last 3 pages of the logbook
11/ Copy of passport
12/ Official printout of criminal record file issued by state of residence (max. 3 months old)
If you are You Tube poster Choppie24, looking at your video I think you may be jumping through a few hoops to get that mod for the booms approved in EASA land!
FUGRO must have some good lawyers you can use -