Creating songs

[blackbudda at katamail.com]

Hi everyone! I'm new to pydance but i'm already a gret fan.
I've tried to make some songs but, altough the process is clearly 
explained on the web, i've seen it's a vry time-consuming procedure: for 
example when I want to try the steps near the end of the song I found no 
better alternative than dancing all the song!
How do you do that? Are there any programs that let you dance only a 
snippet (20-30 sec) of the song?
Thank you.

Luca