A little hep with A/V, I/S issues please

Hello, i recently purchased a sansa Fuze+ , and aside from some glitchy control issues, which were resolved with my first firmware update, i have been fairly happy. My issue is that none of the software intended for use with the fuze+ is digitaly signed. As such the A/V i run tends to caution against installing it. Would sandisk please consider digitaly signing its software or submit it to comodo (i know thats a lot to ask) for analysis?