Reloading user settings after a fresh reinstall

[Larry Hartman]

The last time I installed Kubuntu I made sure that my /home directory was on a 
separate partition.  I am thinking of reloading feisty as a fresh install, my 
current load is twice upgraded.  I wish to do a fresh install of Kubuntu and 
retain my user settings.  

Can someone give me some guidance or point me to forum entry, etc?  Would like 
to have the general steps laid out for me.

1.  Do I need to use the same username and password?
2.  Will I have trouble setting up KMail?

Larry