Scripting Cubase SX3 (on Mac)

Before switching from Cubase 5 to Cubase 6, and from Snow Leopard to Lion,
i would like to convert a few hundreds VST files to the newest format using the SX3 licence that come
with Cubase 5. (SX 3 will not works on Lion).

Is there any way to script the process ? My understanding is that it is not possible with AppleScript,
but i read messages around hinting to the Automator.

Any body knows better ?