I don't know visual pinball, so I don't understand exactly what you want to do.
You have several table and you want to load some of them with VP and some other with FP ?
You can use FPlauch if :
1 - it work in fullscreen
2 - if it doesn't close after you select the table, else mGalaxy will return in same time you load the table (mGalaxy wait for the application finish to come back).