Sorry, we use Vmware GSX 3 Server on a Redhat Enterprise Linux (Version 3). But I think the ESX Server is based on a hardened RHEL too. Whe I tried to install REHL, I had the same proplem like iddeabvba with the installer terminating with 'the installer exited unexpectately'. Then I tried to boot the server with REHL Version 5 and the installer came up with the error that the blocksize of 4096byte blocks is not supported and the he wants to reinitialize the LUNs. After setting back the LUNs to 512byte blocks it was no problem to install the system and everything is working fine till now. But I think it is a different problem to yours.
I use is a QLA 2340 in the DSS. All other servers use Emulex LP 8000/9000 (1 GBit) controllers. They are connected with a Brocade Silkworm Switch. Two of the servers are for development and one for production use. If I have time next week I will try to install the ESX Server on a forth machine, maybe I can tell you more after that.