If you are interested in time evolving simulation and analysis on biochemical networks, we recommend you to install the Systems Biology Workbench (SBW) and SBW-powered softwares before you install CellDesigner (*1).
Please check http://sbw.kgi.edu/ and download the software from Software/Download section.
To install SBW and SBW-powered software:
If you would like to use CellDesigner alone right now, you can postpone this step until you need simulation and/or analysis.
(*) As of June., 2006, SBW 2.5.5 is available.
For details on SBW information:http://sys-bio.org/research/sbwIntro.htm