I was able to download the CSSC Management Utility from the following path (assuming that you are logged on cisco's website and you have the appropriate account):
Downloads Home > Products > Wireless > Client Adapters and Client Software > Cisco Secure Services Client > Secure Services Client Software > Windows XP-5.1.0
The file name that I used was: SSCMgmtUtil_5.1.0.3.zip
Regards