Explain, please

SLES10SP1
Hardware: Intel DQ965GF with 4G RAM

This server for XEN. In the XEN will be work 2 guest system:
guest1: sles10SP1 with postfix+clam
guest2: GW7Monitor

1. Which DVD use for install:
SLES10-SP1-i386
or
SLES10-Sp1-x86_84

2. Wich kernel use: BIG or normal for XEN-server ?

3. Wich kernel use: BIG or normal for XEN-guest OS ?

4. Wich CD use i386 or x86_64 for XEN-guest OS ?

Serg