I recently downloaded the P-51D 'Slender, Tender and Tall' which I realized is just a texture replacement add-on but the read me text says it requires the A2A FSX update. I'm not sure what this is referring to. Did they mean ASA (Active Sky Advanced) software? A search for A2A in my browser returned a sight that actually has a P-51D but I cannot find anything on that sight that refers to a FSX update. Any help would be greatly appreciated.
Ask here, they make the original aircraft. it's payware.