What you need (see the download pages) :
- JAVA SDK
- JES
- JAVACOMM API
- RXTX library
- MBUNDLES package

and a root access of course !!

1. JAVA SDK

You have to choose the directory where you want to install tha java sdk, we recommend /usr/java/. There you do :

# ./j2sdk-1_4_0-linux-i386-rpm.bin
# rpm -i j2sdk-1_4_0-linux-i386-rpm

The j2sdk is installed in /usr/java/j2sdk1.4.0/
After that you have to update your .bash_profile (hidden file in the /root/ directory) by replacing and/or adding the lines :

export PATH=$PATH:/usr/java/j2sdk1.4.0/bin
export JES_JAVA_HOME=/usr/java/j2sdk1.4.0

Stop and restart the session in order to have the .bash_profile reloaded.

2. JAVA Packages

JAVACOMM API
Just unzip the javacomm20-x86.tar.Z and copy the comm.jar in /usr/java/j2sdk1.4.0/jre/lib/ext/

RXTX library
Unzip rxtx-1.4-15.tar.gz in the directory of your choice (after installation, we'll never use again this package). Then do :
# cd rxtx-1.4-15/
# ./configure
# make install

If everything goes right, a javax.comm.properties is created in jre/lib and you find a jcl.jar in jre/lib/ext/

3. JES

We install the Java Embedded Server in /usr/java/ :
# unzip jes-2_0.zip -d /usr/java/
# unzip jes-2_0_01.zip -d /usr/java/
# cd /usr/java/jes2.0/
# java setup

Then
# cd bundles
# chmod 664 *

For your convenience, you can change the PATH line in the .bash_profile in order to run "runjes" from any directory :
export PATH=$PATH:/usr/java/j2sdk1.4.0/bin:/usr/java/jes2.0/bin

by the way, make sure you also have these lines :
export JES_INSTALL_DIR=/usr/java/jes2.0
export CLASSPATH=.:/usr/java/j2sdk1.4.0/jre/lib/framework.jar and that's all !!!
You have to include other libraries for compilation purposes in the javac command line and not in the CLASSPATH env variable...

After a session update, we can run the java server :
# runjes

Java Embedded Server 2.0
Copyright 1998, 1999 and 2000 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.
Type 'h[elp]' for a list of commands.
>
we will need these bundles :
> start log, servlet, http, tcatjspcruntime, httpauth, httpusers, jesmp

4. Mister Bundles

Unjar the package where you want :
> jar xf misterbundles1_0.jar

Optionnal but recommended : mbundles.conf is to be cut and pasted in your HOME (env var) directory
else it will be created with your own parameters

You are ready to use MISTERBUNDLES !
see the user or developer manual