I didn't make it work yet. I just paid $5 for the privlige of downloading it from some giant international driver database. The zip contains only the two files "SCambulk.inf" and "SCambulk.sys" I guess that somehow these files allow other software to detect and access your sanyo digital camera model VPC-550. Supposidely for win'98 or win2000.
Let me know if you figure it out!