Hi Bartus
I tried to do the same thing i also got the dn2820. Intel says that boot on cold (S5) should work with USB or the internal IR receiver. But i tried everything and didn't got it to work. I have an RC6 remote and a USB Remote both work out of the Box but no boot on cold. So i think this is a BIOS issue. There are some users reporting boot on remote works. So i think we have to wait for a new BIOS or buy a different device.
Greetz