Flex :: Security - Running Application/swf In Local Mode?

We are using flex for same. (Although I know flex is meant for web application and air application is best suited for desktop clients, but due to some build issues we can't go for air applications). Now according to our use case we required to read file from local file system which is not allowed in flex application due to sandbox policy. To override it we had planned to use it in local mode (i.e. running from local file system instead of deploying in web container). So after running application in local mode it bypasses sandbox policy and allows to read local file. Eventually we requires remote services call (either using web services or blaze ds) also in our application. To avoid sandbox restriction for network access in local mode we are planning to explicitly grant network access permission to our flex application.