Don't take your screenshots before you have lit the map.
When you are ready to take the screenshots go to
www.imageshack.us and upload your screenshots there one by one.
I'll tell you how to do it step by step.
First, on the main page, click "Browse" and look for your screenshots. They are in the folder ..\Paintball2\pball\scrnshot
When you find the screenshot you want to upload doubleclick it.
You can leave the "email" box empty.
Click on the little box to the left from "resize image" and make sure there is that little green thing. Also put that green thing the box under the resize box. Also select "640x480 (for message boards)" by clicking the arrow down to the right from "rezise image"
After you have done all that it should look something like this.
When you have this, simply click "Host it".
It will upload the screenshot, this might take a while.
When it's ready it will open new page, you should see your screenshot as a thumbnail. Click the thumbnail and it will open it in a bigger version.
You should see a little box saying: "Thumbnail mode Yes/No"
Select no.
Then simply click the Forum link and hit ctrl + c.
Then go back to the forums, write your post and when you want to put your screenshot hit ctrl + v.
It should paste a link something like this here:
URL=http://imageshack.us]
[/URL
Congrats, you just posted your first screenshot.