You can use Access/CPN with or without Eclipse. We strongly recommend using Eclipse.
Get binary releases from the CPN Tools Download page.
The source is available from
(Note that you get a security error when clicking on the link; this is because the Subversion server uses encryption with a self-signed certificate.)
You will not need all plug-ins for normal operation. Here is an overview of available plug-ins, their dependencies, the operation they provide, and how likely it is you will need them.
The abridged version: You'll almost always need
An easy way to use the cosimulation plug-in is using ProM (recent nightly builds or 6.1 required) and the package Cosimulation available from the package manager.
For video demonstrations of Access/CPN integration with ProM, we refer to