Hi,
NI Germany was correct, Testexecutive is no longer available, this was a tookit available for LabVIEW 5.1 users.
The natural replacement for Testexecutive is Teststand, which is not a toolkit for LabVIEW but rather a development enviroment by itself. So, you can look at Teststand on the following link :
http://sine.ni.com/apps/we/nioc.vp?cid=1459〈=US
I don't believe you need to contact NI USA, I strongly believe NI Germany should be able to help you on this wth no problem.
Best Regards
Andre Oliveira
Applications Engineer