Two ways
The long way:
If you want to say, remove Firefox from the favorites list -
Click Menu > Internet - right-click Firefox Web Browser, click Remove from Favorites
Similarly, to add programs to your favorites list - right-click the program in the menu, click Add to Favorites.
Short way:
Click and drag a program off the Favorites list, and to add a program from the menu, drag it onto Favorites.
caribriz
Desktop: C2D E6400 / Asus P5LD2SE / 2GB ram / Asus GeForce 210 / 320GB (WinXP) & 1TB (Mint - various)
Laptop: Asus A53E-SX1455V - i5 2450M / 4GB ram / Intel HD 3000 / 500GB (Win7/Mint 14 Cinnamon)