Yes, CentOS is basically binary compliant with RHEL, however, that doesn't make it RHEL. The officially supported Linux OS for 9.3 are SuSE SLES 10/11, RHEL 5/6, and Oracle Linux 5.5/6 (Which is also basically RHEL). You can view that list here: SAS Supported Operating Systems
As for the list of what libraries you are missing, as I mentioned in the previous post, they are listed on page 5 of the document I linked, also below:
http://support.sas.com/documentation/installcenter/en/ikfdtnlaxsr/64419/PDF/default/sreq.pdf
If you are using 64-bit Linux, then you need 32-bit and 64-bit versions of the following libraries/packages:
libXp
libXtst
libXext
(there are possibly others as the lists provided assume you are using a officially supported OS, and no matter how similar, there are always differences among flavors of Linux)
Also possibly these:
compat-libstdc++-33-3.2.3-61 (This is a RHEL5 package for unicode support, not sure what is applicable for your version of CentOS)
glibc 2.4