tow instances but one webapps : possible ?

[coucou78 coucou78]

hello,

Here we need to have two instances of Tomcat 5.0.30 running at the same time
(tomcat1 , tomcat2) , for sure on differents ports,
BUT those instances must have the same webapps folder.

../webapps : app1
                   app2
                   app3
                   app4

tomcat1 should host app1 and 2
and tomcat 2 should host app3 and app4