You don't load the script into the database. The DB is for the content.
Each script has its own instructions, however, most of them require you to:
1. Create a database, with a user, and set permissions for this user according to the script instructions.
2. Load the script files into a folder in your public_html (root directory). Usually this folder has the same name as the main folder of the script. You do NOT uload the script zipped.
When uploading you MUST respect the same folder structure as the script.
3. You run an installation wizard that is usually included with the script. Sometimes this wizard will have also a routine that will create the necessary tables in the database, some other times it will not, and, in that case, you usually run separately a SQL query script (also included with the script, see instructions) that will create the necessary tables in the database.
So the answer to your question "What if I created a folder thru FTP in my root, and then individually imported each file from the osDate software into the folder? Would it then work to allow me to open
http://my_dating_site/install.php?
is yes, provided that you have completed steps 1 and 2.