i have renamed the alfresco.war file to"product.war" . the explorer side works but share in no longer working. are the some files i need to modify in share?
You need to tell Share where you've moved the Repository to.
Grab the webscript-framework-config-custom.xml.sample file from webapps/share/WEB-INF/classes/alfresco/web-extension and copy it to tomcat/shared/classes/alfresco/web-extension remembering to remove the ".sample".
Then fix-up the endpoint-urls to match what you've altered and restart Share.