Thanks. Now I successfully installed kernel 3!

The naming errors where due to the fact that I used wget and only modified the filename after I had download the kernel 1 file:

i.e.

first I downloaded https : // garage. maemo. org / frs / download.php / 9327 / kernel-dt-sd_2.6.21-1_all.deb
(ID 9327)

then I downloaded https : // garage. maemo. org / frs / download.php / 9327 / kernel-dt-sd_2.6.21-3_all.deb
(ID 9327)

instead of https : // garage. maemo. org / frs / download.php / 9431 / kernel-dt-sd_2.6.21-3_all.deb
(CORRECT ID 9431)

;-)

I will have to check now if the other files installed really are all up-to-date.