Hello,

I suggest an new install. The database engines in version 3.1 are very bad.
So you will have an bad performance when you upgrade to 4.2. It is possible
but not recommended. 
For the second question you'll need to reed the manuals. I think it is
possible. The installations wil be in different directory's I think 3.1 is
installed in /usr/lpp/adsm/bin ore something and version 4.2 will be
installed in /usr/tivoli/tsm/server/bin. So that will not be an problem.

If you succeed, let us know.

Thanks in advantage

Ronald Bazuin
Fortis Insurrance
NL