You need root privileges to add a task to the start-up list, and that isn't available in recent firmware versions.
I didn't know that, but I really don't like it. I thought that Pocketbook wants to create an open source community around its products and it won't follow Apple and other manufacturers that know better what's good for me. Here's what I read at slashdot today: hardware.slashdot.org/story/12/03/20/0115228/ifixits-kyle-wiens-on-the-war-on-diy-electronics
After a year and 3 months of using Pocketbook, I'm not sure that it got to the point where its quality is adequate to the price