I was just thinking of populating the file list (with the result of my script VaryParams) and launching the user interface (fire and forget, with the launch() method).
Oh well, thank you very much.
I learned a lot of thinks by blinking the raw images with a common STF, I really see the sky becoming darker, the effect of filters, the comsic rays that need to be supressed at integration time, .... This is really a grat tool. Thank you very much.