[ Using easy-debian from extras and debian-m5-v2-rootfs.tgz ]

It seems that for the N810 keyboard, easy-debian uses the rx-44 file in
/usr/share/X11/xkb/symbols/nokia_vndr/ , not in
/debian/usr/share/X11/xkb/symbols/nokia_vndr/ ??

By accident I finally found a way to get proper swedish umlauts in easy-debian.
Changes to the rx-44 file in the /debian/usr/--- directory hadn't helped,
but then I happened to put the same modified rx-44 file into the /usr/--- directory, and hey presto, I got swedish instead of danish umlauts in leafpad and OOo under easy-debian!
( In the chroot terminal, though, they had always appeared.)

Ctrl-Chr works in easy-mer but not, it seems, in easy-debian, except in the chroot terminal.
So I changed type="EIGHT_LEVEL" chr-maps in the rx-44 file to 4-level, keeping the swedish but deleting the danish umlauts.

EDIT: Or you could reorder the eight characters so that the first four are those you want in easy-debian.