OK - since they're in the "user-defined" category, there is no separate .RPT file for them. They are just variations of the "standard" category reports, which is all those .RPT files you are seeing. Here's how we should proceed then:
1) Install the client on the new machine.
2) Go to the old machine, and locate the file "nicrpt.mdb" in my PC it is
C:\Program Files\Nortel Networks\Symposium Call Center Server\Client\en\data folder.
3) Make sure you are *not* logged into that client, and make a copy of that file (on a floppy, or network drive that the new PC can access, etc).
4) Go to the new PC, and rename that file to "oldnicrpt.mdb" just in case we need it later
5) Copy the "nicrpt.mdb" file from the old client to the same place in the new client.
6) Start the client on the new PC, and see if your reports are there.
Now, here's my disclaimer - I haven't done this before; and I'm also working on a newer version than you. However, the clients seemed to have not changed in basic structure, so I'm hoping we'll be OK. If it doesn't work, then you will need to just delete the copied nicrpt.mdb file from the new client, and rename oldnicrpt.mdb to nicrpt.mdb; and it should work as a freshh installation. *Then*

you will need to go to each report on the old client, and simply write down its settings, then go to the new one, and make copies (known as "User-Defined") and define them as they were on the old one. Let me know if you get to that step, I can walk you thru it or email you the NTP from v3.0.
Wishing you the best of luck! -Matt
Matt H.
TMC - KCMO, USA