Go to you ZPS directory> find Screen shots remember that directory
(Drive)\Steam\steamapps\User\Zombie panic Source\ZPS\Screenshot
(remember this directory) (drives may vary by what your using)(user may vary by your steam login)
Use sites like:
http://es.tinypic.com/ *language is in spanish but its self explanatory to what you need to do*
http://imageshack.us/ *Recommended because you can change the size of your image*
Then upload your screenshots/ images
use the directory that i layed out and browse for the image that you want.
once uploaded; they give you URLs widget codes etc
Use the forum code and get rid of the unnessary parts so all that’s left is;
URL=http://img844.imageshack.us/i/96345868.jpg/IMGhttp://img844.imageshack.us/img844/3238/96345868.jpg/IMG/URL
( I had remove [ ] just so I can show the an example format so don’t remove it when you are uploading )