[quote=&quot;catbird&quot;]I have tried to download many maps, etc and I do not know how to install them.  Many times the OS says it does not recognize the program, other times, it is winzip, which has changed enough than I do not know how to use it.[/quote]
OS does not recognize what program?  Is it a .exe file?  .rar?  That sounds like something I'm familiar with where windows says it doesn't recognize the file (or file type) and asks you what program to open it with.  If that's the case knowing the 3 letter file extension helps a lot.
Rule #1 for Vista and XP is to NOT hide file extensions.  Start Menu-&gt;ControlPanel-&gt;FolderOptions - the settings is circled as it should be - not checked.
[img:66ee0d57a4]http://img8.imageshack.us/img8/8620/20090211232454cp0.jpg[/img:66ee0d57a4]

I have a post with instructions and a video covering how to get maps out of your cache folder (they get there if you play online and have to download files from a server) the hard way here: http://dfbgaming.com/modules.php?name=Forums&amp;file=viewtopic&amp;p=56254#56254
The difference between XP and Vista for those instructions are:
XP's My Documents\My Games\Unreal Tournament 3\UTGame\Cache 
would be
UserName\Games\Unreal Tournament 3\UTGame\Cache  
or 
UserName\My Games\Unreal Tournament 3\UTGame\Cache 
if I'm not mistaken.

My post here:
http://dfbgaming.com/modules.php?name=Forums&amp;file=viewtopic&amp;p=56230#56230
has some pics that may give you an idea of where certain file types need to go.

Of course... if you are trying to install maps from .rar files, you need a program like [url=http://www.rarlab.com/]winrar[/url] or [url=http://www.7-zip.org/]7z[/url] because as far as I know winzip doesn't do rar and windows only opens .zip archives by itself - no other type I can think of off hand.

If it's UT3 tweaks you want, we have info and links here: http://dfbgaming.com/Thread6430.html
and/or get Brad G's tweaker here: http://www.brad-g.com/unreal-tournament-3-tweaker-v5-0-t2.html but it's my opinion that you should read about how to do the tweaks manually in the .ini files and get a good idea of what different settings will do before just jumping into a tweaking utility like that one...