Hi,
From the release notes i can read :
"Note that the minimum RAM required to install Red Hat Enterprise Linux 4.92 has been raised to 1GB; the recommended RAM is 2GB. If a machine has less than 1GB RAM, the installation process may hang."
Is it a joke/mistake ? :-O 1GB !!!
I tested installation process with 256M / Celeron 600, seems to work ...)