is there any script available similar to imageshack so the user can upload photos and after copy paste the link as an example on a forum and the photo can appear properly?

For free look at Scripteen Free Image Hosting Script for paid YAbsoft's Advanced Image Hosting Script.
Good luck!

I think I have a Picture Sharing script that I used once .. May be it would help it's paid one don't remember the demo page ..

famous directory for clone script is scriptcopy.com