On Tue, 28 Jan 2014 16:31:47 +0100 Andreas Reschke wrote:
My question is, can I switch afterwards the test from Red Hat 7 Beta to CentOS without reinstall the system?
No.
While it may (or may not) be technically possible to do that, it not a supported method and is guaranteed to be far more work than it would be to simply re-install from scratch.