For a local build yes, you need to upload at a minimum the following files (make sure none of the files have spaces in them):
All of these files are located in the bin/ directory when you build for iOS locally (assuming it's a rhodes application). If it is another type of app the rhogallery help page has instructions on how to setup the .plist file:
Local Build - Upload the files you have built yourself. For WM: .cab file. For BlackBerry: .jad file and all .cod files. For Android: Signed .apk file. For iPhone: .plist file and .ipa file.