I'd been using CHDK build for my A530 (SDM) for some time. When I changed the video quality settings, they would remain "saved", even after the camera was turned off, and on again. Since then, I swapped my A530 for an A570 IS. I tried both available builds (Allbest, and SDM), but camera uses the CHDK quality settings only while the program is loaded in its memory. Is there any way to use the settings, without loading the CHDK?