Yes you can ADD the EXTERNAL PRODUCT PACKAGE that was downloaded from CA Support Online, to CA CSM for product installation:
Follow these steps:
(1). Copy the product pax file that was downloaded from CA Support Online to a OMVS USS directory on LPAR where CA CSM is running.
(2). In CA CSM, click the PRODUCTs Tab and find the name of the product and release that you are going to add.
(3). Under the Release right click on the gen level and select 'ADD EXTERNAL PACKAGE'.
(4). Type of Input Source: * Unix File
Unix Path: /u/users/baije01/package.pax.Z
Where Unix Path = is the USS path name where the pax file resides.
Where package.pax.Z = is the name of the pax file
(6). Click OK
Upon the successful completion of the ADD EXTERNAL PACKAGE task, click Refresh on the page.
Find the product name in the and under the release select the gen level.
The contents of the product package is displayed.
To install a package component, click the ACTION button to the right of the desired component and click INSTALL.
The wizard guides you through the rest of the product installation from here.