I just follow instructions:
1) locate your project in the Flex Navigator panel (Package Explorer panel in Flash Builder);
2) right-click on the project and choose Properties, or open the Project menu and choose Properties;
3) in the project properties dialog, choose Flex Build Path;
4) select the Library path tab, and press the Add SWC... button;
5) enter the location of the component SWC, which should be [unzip location]/Client/Components/OpenSpace_Flex_2X.swc;
6) press OK in the Add SWC dialog;
7) press OK to close the project properties dialog.
OpenSpace is now available in your project. Create a new MXML application (or open an existing one), switch to Design view if necessary and drag the OpenSpace component from the OpenSpace folder in the Components panel to the stage.
NOTE FOR FLASH BUILDER 4 USERS
In Flash Builder 4, when the Flex SDK 4 or later is used, the following warning may be displayed when switching to the Design view: "Design mode could not load OpenSpace_Flex_2X.swc. It may be incompatible with this SDK, or invalid. (DesignAssetLoader.CompleteTimeout)". This is a bug in Flash Builder that affects most swc files of other popular projects. Even if the OpenSpace component is not visible in design view, this does not affect the compilation or the project in any way.
Im code in FlashBuilder 4.5
http://fotki.yandex.ru/users/tcsayan/view/390734/
And it does not work. And another Flash Builder is not my favorite application, usually i use FlashDevelop, and i dont understand how i can use openSpace in FlashDevelop.
Also what i need to do if i dont want to use SMartfoxBits ?
rjgtav thanks for your earlier help(and sory for my bad english

)