loadtestrunner and soapui.ext.libraries

Dear SmartBear Community,

since a while we are succesfully using ReadyAPI succesfully within our continuous integration flow. In our tests we are using an external libray (jar file).

This is working fine for normal tests (testrunner.bat) using the JVM parameter:
-Dsoapui.ext.libraries=XX
Now we have to run loadui tests as well on CI and the problem is that the JVM parameter mentioned above isn't taken in account by the loadtestrunner.bat.

We do not want to put this jar file in /bin/ext folder of ReadyAPI.

Is there any way to specify the using of an external jar file by calling loadtestrunner.bat ?

Thanks in advance,

WACZEK Ludovic