More dumb newbie questions

[John Desmond]

Salutations, gentlefolk !

I recently switched from Windows to Kubuntu Linux 8.04.1, kernel 
2.6.24-14, KDE 3.5.10, and am wondering how to deal with the following 
annoyances.

1 - Desktop icons - I'd like to change the icons so that 'file folder A' 
  is represented by one icon on my Desktop, while 'File Folder B', File 
Folder C', and so on, have different icons.  But when I click on 
'Properties' for that folder, then 'Select Icon - K Desktop', and pick a 
new icon for that folder, the system uses _that_ icon for _all_ file 
folders on the desktop.  How do I change that ?

2 - The 'K menu' - How do I reset the number of items listed in 'Current 
Documents' from the current (default?) 8 to 20 or so ?

3 - The default for Linux seems to be that files downloaded from the 
web, etc, keep the date that they were originally created.  How can I 
change this so that downloaded files take the date they were 'created' 
on my computer ?

Thanks very much for your help with these.

Yours, John Desmond