drawing on video

[choochoo girl]

does anyone know how to create the look of drawing on top of video footage? for my next day60 piece i'm very interested in having hand drawn looking art work on top (like a layer) of the video footage. which software app should i use?

second technical question: can i import an swf into after effects? if so, can it be done so that the swf maintains its alpha channel so that it doesn't cover up the entire frame of whatever is underneath? i'm interested in having flash, vector-based animation happening on top of video.

thanks in advance for your help,
jenny woo