Open the file org/sepy/iGallery/core/Config.as and edit the static constants to reflect your Flickr and Yahoo API keys.
In your Flex2 project use as source path these folders (included in the zip):

[source path] corelib-trunk-src-actionscript3
[source path] flickr-trunk-src-actionscript3
[source path] test-flex-2-gettext
[source path] yahoo-api-source-as3
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