Software used for pedal layouts on Beavis audio page

[add4]

Hello,
I'm wondering what was used to draw the nice looking layouts on Beavis audio.
I'm talking about these schematics of the box, switches, DC jacks, and jacks all looking very realistic and (i guess) in real size.
I guess Beavis didn't draw all of this by himself in paint, did he?
Does anyone knows what he used and how he found the parts images?

[jdub]

I think I recall Beav saying that he used Microsoft Visio.  As for his parts images, I'm not sure.  They are damned fine looking schems and layouts, though