how to achieve these styles?

Found a site with pictures to help you (easier this way then it is for me to try and make sense of my normal ramble...) for products... honestly I suggest experimenting :) Hope this helps, post pics once you do it!

http://www.lovers-suicide.com/howto.html

(EDIT: You can try manga head by garnier that's fun to play with. And um... Don’t know if what I posted helped you, but happy experimenting :) Hope all goes well. If you need more help you can try hitting the cosplay forums, most of them have pretty good JRock styling tips. Here's a post someone made on exaggerated hair: http://www.animenation.net/forums/archive/index.php/t-157475 .html Hope that helps.)