Eclipse Development IDE with Tomcat – Using external Tomcat binaries with separate CATALINA_BASE

I am trying to configure Eclipse to use a CATALINA_BASE that is different from the CATALINA_HOME. I know how to configure eclipse to use an externally installed Tomcat (outside of eclipse), but I cannot for the life of me figure out how to repeatedly configure it to use an external set of configuration files (server.xml, catalina.properties, etc.) that are not part of Eclipse OR the installed binaries.

I prefer to have my CATALINA_HOME and CATALINA_BASE be seperate.

Any help would be awesome!

Thank you,