Could You tell me how to install preview of the picture? I can't find it in the forum or there's no FAQ...

I vote bad. You should learn how to create the preview image. I view download count as yet another type of rating system. Without a preview, everyone must download your image to view it, so your download count goes up but its unfair. Not that this is really a competition. If you need help creating a preview image, I'm sure you can get in the forum. I didn't download your image btw, so please add a preview so I can make that decision.