Hello Michael, hello Mike,
P3 can read mpx files : in P3 menu : Tools/ MPX conversion utility.
Now Primavera supplies a tool which converts mpp files to mpx files. But if
you still have a Project 98 software, you can do this conversion yourself.
NB : the dependancies on Project summary tasks will be lost... but a good
planner don't uses such links ;-)
Hope this helps,
Gérard Ducouret [Project VMP]