I have downloaded all the portal files and application server files listed on
http://www.jboss.org/products/jbossportal#files. using RC1 version. I also tried downloading the same from link http://www.jbossgroup.com/?module=bb&op=viewtopic&p=3877126.
When i tired to setup the example jbossportal using binaries it worked fine, but when tired the same using the sources the deployment failes.

The build file generates files "jboss-portal.sar", "portal-cms.sar" portal-core.har so on, under core\output\lib directory, but when i try to deploy to server\default\deploy it fails with error "Access Denied". I see under
jboss-portal.sar directory. jboss-portal.sar, a file is trying to replace a directory jboss-portal.sar. Is that how it supposed to happen? Any help regarding this is greatly appreaciated!!!

Instructions that followed can be found at

http://docs.jboss.org/jbportal/v2.0RC/user-guide/en/html/installation.html#d0e412

2.3.2. From the sources

You will also need to put the jar file of your database connector in $JBOSS_HOME\server\default\lib.

Warning
Make sure that JBOSS_HOME is still defined in the environment or it will not deploy.
Finally, you can deploy JBoss Portal by going into the build directory and by typing build deploy. It will deploy JBoss Portal in the default configuration of JBoss.