Chat script modifications

I have a picture post chat script that currently does not require users to login i would like a very basic login system for it all it has to do is get the user to choose a username (5this only has to be stored temporaraly for the dropbox as they can change each time they come to the site )press submit then be taken to the chat script but in the chat script i would like there usernames displayed in a dropdown box and where the user can address each other by using the name in the box ie Cam says to (chooses name from select box) eg Jenny then the rest of the message is displayed. i have included some diagrams which might help explain. **I must warn all this is a live script working on adult website so if this offends please dont bid ** ** The script is located on the server and is the only copy at the moment ** ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform linux redhat 7.2