I have someone working on an adobe flex project with cameras, I'm not sure if he sent me the source?

Hello, I paid a web designed to create an adobe flex project, it includes cameras, I paid him and asked for the source code. he sent me a zip files, inside this file all I see are a bunch of mxml files (which won't open in flash cs5), something called P2PCHAT.css, .flexproperties a .svn and .settings, html-template, libs folder.. I cannot modify any of the graphics, the main file appears to be a swf file. Isn't there supposed to be a master .FLA for flash in here? It is not included in these source files anywhere. Any help would be appreciated, thanks.