Instructions for installation:

1. Click on the spinning UQ symbol to download UltraQuakeV2 (uqv2.zip).
2. Go to your Quake directory and make a subdirectory for UltraQuake like quake\uq.
3. Unzip uqv2.zip there.
4. Run UltraQuake by adding -game uq to the command line you use to run Quake.
(uq or whatever you name the subdirectory).

Mirrors:
http://avatar.telefragged.com
http://www.quakemania.com
http://yoss.canweb.net
ftp://ftp.gamesdomain.com