First off you have put photopost in the correct place it dosnt have to go in a folder called html.
Secondly when you set up your mysql database it is irrelevant what you call it, it dosnt have to be"photopost" the important thing is to go back to your control panel and note down the following:
So you should have something like this below:
PhotoPost Database Host = usually something like mysql9999.yourhost.com
PhotoPost Database Name = tedgalleries or whatever you named the database as.
PhotoPost Database User = tedgalleries probably the same as database name but depends what you input when setting up.
PhotoPost Database Password = your password when you set up the database.
Hope this helps you out & gets you to the point im at, im new to this as well so stumbling through, anyway good luck & best wishes