BL460c G6 problem with installing red hat 5.1

[Azamat]

hi, everybody
i`ve some troubles with installing RHEL 5.1 on the BL460c G6. i`ve tried to install RHEL 5.3 without any problems.
so, can anybody answer on the next question:
1. which differences between rhel 5.1 and 5.2 or greater?
2. can i use license keys (i mean we`ve bought 1 year support), which was with rhel 5.1 on the rhel 5.3?

thanks in advice

[Azamat]

sorry
i`ve already found

https://hardware.redhat.com/show.cgi?id=486668 Certification – ProLiant BL460c G6 from Red Hat company
http://h18004.www1.hp.com/products/servers/linux/bl460cg6-drivers-cert.html HP ProLiant BL460c G6 server – Linux Support


problem resolved