How to append the Asset into your scene
To use this Asset, just go into the destination project and click on "File" > "Append" , then navigate to the file you downloaded and append the Group (not the Object!) with the name "Asset_Rope_Bridge".
How to arrange the bridge:
The bridge has several empties associated with it. Use them to translate and arrange it in the desired position:
If you have other problems, feel free to contact me via my blendermarket page!