questions about folders in the menu

Each does a slightly different thing. Here is a quick overview of the four:

• New Folder: makes a new folder with nothing in it.
• New Smart Folder: makes a new smart folder and lets you define the rules. Smart folders can group files together that aren't necessarily stored in the same place, such as all files with a particular set of tags or certain music and image files. They dynamically create their contents, so adding files to them is as easy as making sure a file satisfies the smart folder's rules. Google can explain more fully and tell you about the different rules you can use.
• New Folder from Selection: makes a new folder containing all items selected in Finder. Highlight ten files, choose this option, and those files go into the new folder.
• Burn Folder: burns the selected folder to a cd or dvd.

I plan on covering this in my series 2 tutorials for mac osx but in short: 1. new folder creates a new folder. 2. new smart folder creates a folder from your search criteria you set up and places it in your side bar. 3. new folder with selection creates a new folder if you selected 2 or mire items. the short cut key for this is cmd control n. I don't burn stuff so can't tell you what new burn folder does but hope that helps a bit.