Assistance with iOS signing and re-branding of existing application - should be simple!

I need assistance with an iOS application I have but need to brand from time to time (to demonstrate to people different ways it can look) and sign through the Apple Xcode tool. I have specific instructions that need to be followed in order to sign the application that I simply need sombody to assist with via a webex session or something like that (I can generate this). Instructions I need assistance with are here: https://docs.bmc.com/docs/display/public/myit26/Re-signing+and+rebranding+BMC+MyIT+for+Apple+iOS looking to do this today - 19/11/15 or 20/11/15 I have an Apple ID + Certificate etc.(through Apple Developer member login) the command line instructions are where I need help.