I compile most information from there (great site too)

http://mythtvblog.blogspot.com/2008/04/getting-imon-0038-lcd-working-with.html

You first need to get LIRC working, by following the instructions there:

LIRC for Antec Fusion Remote Black

Then install the LCD daemon LCDd using either synaptic or apt-get.

The name of the package is lcdproc

$ apt-get install lcdproc

I have compiled the imonlcd for Ubuntu 8.10 (32 bits):

The module is available there:

http://www.avenard.org/files/media/lcd/imonlcd.so

Configuration file for starting LCDd is available there

http://www.avenard.org/files/media/lcd/LCDd.conf

Put imonlcd.so and LCDd.conf in the same directory.

Edit the startup file:

Change the location where LCDd.conf can be found by editing the line DAEMON_OPTS in /etc/init.d/LCDd.

Example:

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

DAEMON=/usr/sbin/LCDd

NAME="LCDd"

DESC="LCDd"

DAEMON_OPTS="-s true -f -c /home/mythtv/lcd/LCDd.conf"

In this example, both LCDd.conf and imonlcd.so would be located in:

/home/mythtv/lcd