I have wincab set up for the default 3 plays per credit.
Do the following:
1. don't put any coins in.
2. press radio mode button. (turns Radio mode off, a random song appears in the playlist.
3. let it start playing.
4. press radio mode button again. (turns off radio mode)
5. press radio mode button again. (turns on radio mode - another song appears in the queue)
6. repeat steps 4,5 a few times until there are a few songs in the queue.
7. press clear queue.
Viola! you get a credit for every song in the queue.
Perhaps radio mode should check if there are songs in the queue before it adds one, or alternatively, songs added to the queue have a flag to tell wincab what method was used to add them to the queue and credit accordingly?
cheers
Cadder