DMADMIN is to be used if you have exported the projects from the original TDM, since this is not the case it will not work for you.
Assuming that you do not currently have a working TDM with your installation, put the CD1 of the install CDs into your Server and run through the Install, if you don't select any additional modules then no new software should be insatlled and you should get to the TDM instal section. You should then have the option to select an existing Master config file (or something like that), you should then be able to select the original data and have it configured for use on the new machine.
I believe the Team area needs to be stored under the same root position as it was on the original machine, ie. if it came off of X:\Team then you will require an X Drive on the new machine.
Let me know how you get on, I don't remeber the exact sequence to do this but if you're still struggling I'll find my install CDs and see if I can remember a little more.