[nestlekwik]

1) Insert Coins/Tokens
2) Press Start
3) Wait around for the Precautions screen to disappear
4) Now, two selections should appear. An option on the left and right.
5) Left=ParaPara Mode (The arrows are alligned according to each song's official Para Para Allstars dance).
Right=Freestyle
If you want harder songs, pick freestyle.
6) Next, three more options should appear.
Left=Easy
Middle=Normal
Right=Expert
Of course, expert would give you the hardest songs.
That's how it works on my machine at least.