hi,
first... i am not that good and it always difficult to figure out exactly what some one did... especially since there so many ways of doing the same thing...
your first question , yes they probably used PS or some other similar program to do it....
but maybe i can help a little...
in essence i think they probably use a action to automatically create a lot of paths and from that they created the glowing/neon lines... i also think they may have used a little bluring.. also when they used the brush they may have simulated the brush pressure... but not sure.... anyway i hope this helps
now there a ton of tutorials on making neon/glowing lines
this is just a few few which i think will get you started....
http://abduzeedo.com/photoshop-quick-ti ... glow-lines http://cimg.wordpress.com/2009/10/02/ho ... ing-lines/http://www.rnel.net/tutorial/Photoshop/12313 http://cimg.wordpress.com/2009/10/02/ho ... ing-lines/