I have created a modern looking elegant page to be used as a splash screen and also included a username/password functionality.
No need to ssh into the router, just paste my code in the script init section in the Wan UP and the newer version from my github will be fetched every time the router reboots.
Feel free to fork the project, suggest edits etc.
I am unable to post a link to my github project as this is my first post. Perhaps a moderator can add it?
Just search for Tomato-Router-Splash-Page-With-Password by upggr on github
I am very happy that I am able to contribute to the development of this excellent firmware mod :)