I use Decal Converter To make my custom sprays. If you need a spray and don't have a program to make them with grab it and use it. It's simple to use and does a good job 

Another great program, GeekPlay if you wanna view a demo, all you have to do is double click on it and it'll automatically play it for you 

I've had some inquiries about custom skins. The site that I've found that is best for them is cs-skins.net although the last time I checked it I couldn't reach the site for some reason. Hopefully the server will be back up and running befre 2 long.
Also try theCS skinshack, it's part of the counter-strike.net family and has some relly good skins on it. 
Some screenshots of some of the skins that I use can be found HERE