Memory Hacking Software

I'm trying to use the speedhack in a flash game. Its a "guitar hero" style game, is to tighten the musical notes in sync with the music.

I tried to use speedhack in firefox plugin called "plugin container". He reduced the speed of the notes, but the music does not lose your speed, and the game automatically synchronizes with the music notes, making notes'll come all together. And the Score does't count correctily.

I tried to use speedhack in all processes on my computer but none worked.

If you want to test the game the link is this: http://www.guitarflash.me/en/

I would slow down the music without the notes and give them problems.

Thanks
Sorry for my bad english, I'm Dutch.