User Rights

I am trying to install Opera accounting software on a
windows 98 P.C attached to an NT 4 network. I have full
administritive rights on the network but the an error
occurrs everytime I run the program. Opera insist that
the error is related to user rights. They say it wold
require a change in the registry but they cannot help me
with this. I thought that Win98 didn't use user rights in
this way that would block use of a program. Does anyone
have any idea what registry key would need changing or am
I being led up the garden path?

Regards

Steve