On the Swedish blogsite HDR Fotografen I found the solution to the hacking of my Canon 350D. I looked at the chdk site first but to me the explanation was not clear as to how to get the hacks to work. But as the files must correspond to the exact model and firmware of the camera I used the files from http://chdk.wikia.com/wiki/350D and followed the instructions in Swedish from
http://stilbild.nu/fotograf/2009/09/hur-du-hackar-din-canon-eos-400d/ and now finally I can do bracketting which goes up to +- 6.7 Ev. not that i need that much but +- 3 would better than the +-2 I was limited to.
Will shoot some more pictures tomorrow to test out.
It was also fun to use ISO 3200.