How to deploy EAR application twice on WebLogic server?

问题

What I have to do in order to deploy the same EAR application twice on single WebLogic server?

What I have in my application:

EJB layer (EJB 2.0)
WEB layer (Struts, jsp)
logging layer (log4j)
DB layer (Oracle, data source created in WLS)
WLS 10.3.0

What I need:

two instances of the same application on WLS (unique URL (context-root) per application), each instance should use other data source and should have different configuration

What is my problem? I don't know which things I will have to change in my application to achieve my goals:

configuration of the application bases on many properties files, these files are in one directory which is added to WLS classpath (they are not in EAR file)
many classes are static (all methods in class are static)
static logger instance in each class
what about JNDI object - should I have different names for data sources, session/entity beans, etc?
what about context-root and hyperlinks in jsp files?

EDIT

I need to have two different EAR files with unique names and unique context-roots. Each application will be connected to unique data source and will have unique configuration.

I have some questions regarding changes in my application:

what about static methods in my classes? WLS documentation says that each application receives its own classloader hierarchy. Should I be afraid of conflicts? I have statics in client part and in server (EJB) part.
what about EJB names? Should I have unique names per each application? Should I be afraid of conflicts in JNDI tree? I use lookup methods.
what about static loggers in my classes? Can I use prefer-application-packages tag in weblogic-application.xml to avoid conflicts?

Really thanks for help.