The TSM Administration center is our supplied interface. The 6.1 version
has significant improvements over earlier versions, and will support 5.5
and 5.4 servers.  It is available for download with no charge,  see
http://www.ibm.com/developerworks/wikis/pages/viewpage.action?pageId=108888177
 for the location of the download and instructions.  It seems that long
term customers tend to stick to the command line, but new customers who
start with the Administration Center like it, so I would reccomend giving
it a try.

Carol Trible
 IBM Tivoli Storage Manager Development