> Does SL support all the architectures that Red Hat support
> IA-64, PPC, s390x as well as i386/IA-32 and x86_64 ?
As I know only i386 and x86_64
> 
> I *think* that an HP Xeon workstation is IA-64.

Xeon != IA-64, it runs i386 and x86_64,  IA-64 is Itanium and you will not find
much of them out there nowadays.

Sincerly,
Klaus