Download cheat engine if you don't have it already.

Open osu, and play the first note of a song, just to get some score.

Quit the song.

Open cheat engine, and select the osu! process.

Under the 4 bytes drop down box, click array of bytes, and type "01 42 74" in.

Click search, and only one address should come up. Right click this address and click Disassemble in the dissembler

Right click the now highlighted address in the new window and click edit register here thing.

Under the box that says EAX type something like 03000000 and then hit okay

Throw No Fail on and start up a normal/easy song. You dont have to hit notes, just watch till your score gets to around 2 billion and quit.