I managed to resolve my problems. While I was waiting to hear from IBM, I did some research on Ant (an open source product used in the TSM installer) and started looking at XML configuration files. I eventually realized that all the installer was really supposed to do was to execute two rpm commands: one with the '-e' option to remove any existing license package, and the other with '-i' to install the new license package. I executed the latter command manually.
When I tried to install the 6.2.2.0 TSM server I got errors similar to those from the original attempt to install the license file. Executing Linux commands myself was not a workable approach: the installation of the TSM server itself and most of its prerequisites involved nothing more than rpm commands, but the DB2 install was vastly more complex. While I was waiting to hear from IBM I tried the server install again with '-i console' rather the '-i silent' on the off chance of getting better diagnostic messages. I did in fact get a useful message. The installer needs, or thinks it needs, both 32 and 64 bit versions of libstdc++.so.5 (the 'Server Installation Guide' only mentions libstdc++.so.6, with no information on 32 bit versus 64 bit versions). Once the system administrator installed the 32 bit version of the older library, the server installation worked.
