The RCP downloads are meant as a base for building Eclipse RCP applications.  
As such, they do not include an application of their own and simply running the 
RCP install will do nothing.

You can run an RCP application using the VM from IBM Developer Kit for AIX versions 
1.3.0, 1.3.1, and 1.4.0.  The IBM Developer Kit for AIX can be downloaded from:
http://www.ibm.com/developerworks/java/jdk/aix/service.html

To run an RCP application on AIX, you must ensure that your AIX install includes
the necessary filesets and service updates.  Please use the following command to
determine the service level of an AIX fileset on your machine:
	lslpp -l | grep FilesetName

Please see the section below that corresponds to your AIX release.

All AIX releases:
    Fileset X11.adt.lib must be installed (this is available on the AIX
    installation media).

AIX Version 4.3.3:
	For fileset X11.base.lib:
		If service level < 4.3.3.79, you must apply APAR IY27694 
	For fileset X11.motif.lib:
		If service level > 4.3.3.81, you must apply APAR IY41939 

AIX Version 5.1:
	For fileset X11.base.lib:
		If service level < 5.1.0.25, you must apply APAR IY27695
	For fileset X11.motif.lib:
		If service level > 5.1.0.36, you must apply APAR IY41942

AIX Version 5.2:
	For fileset X11.motif.lib:
		If service level > 5.2.0.0, you must apply APAR IY41944

IBM APARs can be downloaded from:
http://techsupport.services.ibm.com/server/fixes