In order for you to use SMART Board software on a competitive product you require a SMART Board software stand-alone license (aka competitive upgrade license). This is available from Steljes in the UK. It will allow you to use SMART Board software with all it's features and functionality on a competitive product.
If you are looking for something more cost effective way to use Notebook files try Notebook interactive viewer. It is a free download (http://www2.smarttech.com/st/en-US/Support/Downloads/default.htm) and anyone with any hardware can use it. It will allow you to open pre-created Notebook files and view and interact with them. However, you can not save your changes in this application, it is only an interactive viewer, not a full version of the software.