Well, I think you have it a little backwards. 2" machines are (with RARE exception) multitracking machines, not mastering. And if you're starting with a cassette based multitrack, you're already in sonic trouble that no mastering medium is going to "fix".
I am guessing he means 2 TRACK analog tape. If this is the case:
1- Get a 2-track analog tape machine
2- hook it up
3- run the prta-studio
4- Hit "record" on the analog 2-track.
5- wait for the song to finish.
Well, I think you have it a little backwards. 2" machines are (with RARE exception) multitracking machines, not mastering. And if you're starting with a cassette based multitrack, you're already in sonic trouble that no mastering medium is going to "fix".