[dba-Tech] VMware - WinXP setup

I have set up a virtual machine and installed WinXPpro SP2 on it.

Now I want to do two things:

a) get the WinXP updates in a file and install it from a stored file rather 
than go through all individual download/updates, also because I want to 
build some more VMs with WinXP.
--Where do I get the files and how do I run the updates? are they maybe on 
my hostPC already, since I have it regular updated?

b) I want to set windows up so that it will each time when it starts use the 
original setup, so that any changes made by malware are gone at each nes 
start. where do I find such setting?

thanks a lot
Lembit