How can I make Dubsteb musics?

I've used virtual DJ but I couldn't make any kind of dubstep. Is there
any other software for making these kind of musics or I have to have
the whole DJ kit?

Like :
https://www.youtube.com/watch?v=TYYyMu3pzL4feature=player_embedded#at=149
(1:04 - 1:58)
or

https://www.youtube.com/watch?v=Vr21MblV0Bw