Hmm seems like i had a problem like this setting up a Novel system way back in dos days we did a switch names thing with a script in edit , just a simple name switch, which you could do with Qt to seperate the programs from using the same memory and library files!!! just an idea, i have no idea of the format or linkage you would need for such a thing been to long and those notes are history from moves. Take care hope this idea helps. Good Luck.