It seems like you want to just keep your entire project directory if I'm understanding you correctly.
Are you sure that they cannot install Maven? If so then you'd want to package maven with the project.
Could you give me more details about the environment you'd be using?
You could easily import the jar into the maven web project. Under the modules section the web projects pom.xml just specify the directory if it is in the same project. If not, you'll have to add it as a dependency. You'll need the group and artifact ID of the jar you want to add. You can find some pointers here.
An example for the project directory structure:
<modules>
<module>the web part</module>
<module>the backed part</module>
</modules>
Each different module would be a sub module of a master project.
This should help you with setting up the classpath. Also take a look @ this:
http://stackoverflow.com/questions/364114/can-i-add-jars-to-maven-2-build-classpath-without-installing-them