Using differents folders with quotes

Hi,

I use Metastock/Reuters data, that I download through “The Downloader”. I have 4 differents folders with different constellation from stocks and/or indices. In Amibroker, I setup it with File->Database settings->Data source: Metastock data Plug-in and by Configure, I added the 4 folders (S&P, AMEX, Europe stocks and Worldwide)
C:\S&P
C:\AMEX
C:\EUR
C:\World

How can I create a Watch List based on a folder? If I want to explorer an Analisys just for AMEX, how can I select it?

And if I decide to update the quotes with AmiQuote (the symbol is the same from Yahoo/Google), how can I select just one folder?

Thanks for the help,

Silveira