broken deps and other errors block apt-get and synaptic

[Felix Miata]

I got during Kubuntu 6.06 install and get trying to add packages several kinds of errors. Install failure forced me to trash a motherboard and CPU after trying for over a day to figure out what the problem was. Replacement
with similar old i440BX and PII CPU let the installer finish, but not without errors. After it eventually finished, I was able to get everything up to date without more errors. Everything that had been installed originally
or that I added seemed to be OK. Then I tried to apt-get edubuntu-desktop. Between apt-get and synaptic, I get a lot of various packaging errors. The last attempt output from apt-get follows:

# apt-get -f install
Reading package lists... Done
Building dependency tree... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
4 not fully installed or removed.
Need to get 0B of archives.
After unpacking 0B of additional disk space will be used.
Setting up dia-common (0.95.0-4ubuntu1~dapper1) ...
/usr/share/doc-base/dia-manual: cannot open control file for reading: No such file or directory
dpkg: error processing dia-common (--configure):
subprocess post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of dia-gnome:
dia-gnome depends on dia-common (= 0.95.0-4ubuntu1~dapper1); however:
Package dia-common is not configured yet.
dpkg: error processing dia-gnome (--configure):
dependency problems - leaving unconfigured
Setting up yelp (2.14.3-0ubuntu1) ...
Warning: /usr/share/gconf/schemas/yelp.schemas could not be found.
usage: gconf-schemas --[un]register file1.schemas [file2.schemas [...]]

gconf-schemas: error: You need to give at least a file to (un)register.
dpkg: error processing yelp (--configure):
subprocess post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of edubuntu-desktop:
edubuntu-desktop depends on dia-gnome; however:
Package dia-gnome is not configured yet.
edubuntu-desktop depends on yelp; however:
Package yelp is not configured yet.
dpkg: error processing edubuntu-desktop (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
dia-common
dia-gnome
yelp
edubuntu-desktop
E: Sub-process /usr/bin/dpkg returned an error code (1)
#

I fetched all those listed packages again with apt-get source, but that didn't help. Are the mirrors' contents corrupted? Can anyone tell me how to get out of this without yet another fresh install?

TIA
-- 
"The Lord is my strength and my shield; my heart trusts in him,
and I am helped."				Psalm 28:7 NIV

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://mrmazda.no-ip.com/