Have you tried to right-click on the sample
http://templates.softbytes.net/flex/and then choose 'View Source'? From the 'View Source' link, it also
looks like there is a source.zip which can be downloaded.
Alternatively, you could get started with Flex 2 by checking
out the quick start -
http://www.adobe.com/devnet/flex/?tab:quickstart=1Or, install the applications and check out the included
samples with full source code.