We have done this several times for customers.

HACMP requires that all of the configuration components, database, log, and
storage pools be shared resources.  This includes the directory
/etc/security/adsm, and also the dsm.opt and dsm.sys files.  These
resources, properly configured, will "identify" which client the take-over
node "is".

This is done with shared disk, symbolic links, and the fail-over scripts.

If you need more specific help, please contact me off-list.

Orville L. Lantto
Datatrend Technologies, Inc.
121 Cheshire Lane #700
Minnetonka, MN 55305
V: 952-931-1203
F: 952-931-1293
C: 612-770-9166
Email: orville.lantto AT dtrend DOT com