Something else you might want to try. Download K3CCDTools Version 1
here (It's free you just need the new key every couple of months. No drama) and try taking an AVI with the LPI and process that in Registax. See how that works out. You may even want to download the free WebCam control program WcCtrl for controlling your exposure, gain, brightness etc
WcCtrl.
BTW you might like to have a bit of a browse over
this page for some other useful freeware digital imaging programs
Something new to play with if nothing else