Saving image with script without hanging the UI

[anv]

Hello, I am attempting to write a script for Photoshop CS6. What I'm wondering about is that Photoshop CS6 has a background save feature - when you do File > Save, you can keep painting while the image saves in a background thread. But when I call save from within a script, the Photoshop user interface becomes unresponsive until the image is completely done saving. Is there a way to save the image in a script without freezing the ui? If not scripting, would writing a C++ plugin let me do this? Thanks.