Slide Presentation help

[sjcosh]

Hi im trying to build a simple training simulation using the slide presentation method in flash, ive got all my background images and nav buttons on the first presentation slide, ive also got a text area set to dynamic that i want to use as step numbers which changes when the user moves to the next slide, also i want to be able to disable the next button on certain slides so the users has to interact with the simulation.

Im have no luck doing either of these simple tasks, can some one please point me in the right direction.