I get this message when i try to install the 530 client. 
I have tried the 2 versions from folders (IA64 aND X64) 

ftp://service.boulder.ibm.com/storage/tivoli-storage-management/maintenance/client/v5r3/Windows/

"This installation package is not supported by this processor type"

The processor is a Zenon 64 bit Quad 4 way processor
IBM Model 8863-2RU

OS is Windows Server 2003 Enterprise x64 Edition / SP1

Tim Brown
Systems Specialist
Central Hudson Gas & Electric
284 South Ave
Poughkeepsie, NY 12601
Email: tbrown AT cenhud DOT com
Phone: 845-486-5643
Fax: 845-486-5921