Do you know if the PHP is set up at CGI or Apache Module?
You should be able to create a file php.ini in any folder that you wish to change the upload size in if there is not already one there. So if you want it in three folders, say the root, and two subfolders (/coffee and /cream).
You would need to create a php.ini file in
All three of these could be the exact same with just the size change if there are no other rules you wish to apply.