install packages fails

fu... off sharp ..!!
Error, only error. A surface like Windows: sometimes
it works, sometimes not. I get only errors while 
trying to install packages. I achived two weeks ago 
to install qpe somewho. The installe claimed always
"Installation failed" (translated from that fu....
german compilation of Qtopia). Suddenly qpe appeared
in the list of installable packages. Now I tried 
one hour again. What a waste of time! 

I can access my apache on my desktop in the 
Package installer network http by
http://192.168.0.51:/home . I downloaded 
MboxReader_0.2.1_arm.ipk  to this site on my 
desktop. But Z. doesn't find the package. 
A fu... message "Installation failed. damage!" 
appears, no more info like in Windows. 
Two weeks ago I transfered the qpe-package in spite 
of this message. Today it doesn't work with MboxReader. 

I would prefer installing by qpe-shell. I have
a nfs-Connection to my desktop. Where can I copy
MboxReader_0.2.1_arm.ipk on my Z. so that the 
Z-package manager recognizes the package? 
I tried to find the place of 
qpe-terminal_1.5.0-2_arm.ipk by using find / -name "qpe*"
but this package seems to exist nowhere on Z. 

Has somebody experience how to install Software from 
a Linux desktop? I achieved connection by "installing
via network" -> Server with URL: http://192.168.0.51:/home
 which is my /home/gerlach  home directory, containing 
MboxReader_0.2.1_arm.ipk  and a copy of it M.ipk 
(chmod 666 M*.ipk).

Is there somewhere a tutorial of the file system structure 
of Z.? It would be very helpful. I don't like to touch 
that graphical install software ...

thx
Ekkard