Server Migration Custom Configurations

Explanation of Project 1) Have recently migrated web sites to new dedicated server and need some custom configurations done to new server so that it matches the legacy server. 2) Have a main web site on server and 10 sub web sites sharing data from the main web site database. All database content is controlled by admin panel on main web site. Server permissions need to be changed to allow the sharing of some image files with the other 10 web sites. No longer in contact with the developer, so not sure how permissions were configured on original server. 3) All databases set up and working fine, only problem is that images are missing on each of 10 sub web sites. Need coder with server experience to review legacy server and see how permissions were set up and duplicate those setting on the new server so that image files are visible on sub web sites. Problem could be matter of permission settings or setting the correct file paths for each sub web site through the database connections.