<SOLVED?>Choppy Movement on Ubuntu 10.04LTS

[0.zer0]

BTW, 35 to 75 fps is not good.

Edit: I've changed the wiki article (omg, ancient) and pointed people to http://assault.cubers.net/download.html, where the required libraries are listed.

Thanks for the update, but when I run that command I get this:

[SELECT ALL] Code:

Package libsdl1.2 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  libsdl1.2debian-nas libsdl1.2debian-pulseaudio libsdl1.2debian-oss
  libsdl1.2debian-esd libsdl1.2debian-alsa libsdl1.2debian-all
E: Package libsdl1.2 has no installation candidate

If I choose to install libsdl1.2debian-all instead, I get:

[SELECT ALL] Code:

sudo apt-get install libsdl1.2debian-all libsdl-image1.2 libopenal1 libsdl-ttf2.0-0
libsdl-image1.2 is already the newest version.
libopenal1 is already the newest version.
The following packages will be REMOVED:
  libsdl1.2debian-pulseaudio ubuntu-desktop
The following NEW packages will be installed:
  libsdl-ttf2.0-0 libsdl1.2debian-all

Somehow, I don't think I want to ubuntu-desktop, so which of the replacement packages should I use, if any?
How is 35-75fps not good?
"In modern action-oriented games where players must visually track animated objects and react quickly, frame rates of between 30 to 100+ FPS are considered acceptable by most, though this can vary significantly from game to game. Modern action games, including popular console shooters such as Halo 3, are locked at 30 frame/s maximum, while others, such as Unreal Tournament 3, can run well in excess of 100 frame/s on sufficient hardware."