A very simple way of displaying different lines of text (aside from just shoving a load of different text objects on a layout) is to use instance variables. In...
There should be an attachment icon (the paperclip) on the formatting toolbar about the text box you use to write the tutorial. You should be able to add files using that.
I did use it the way you suggested, and the code shows "[file=131913]" but when I publish it the file doesn't display.
You might need to publish a couple of times - in the past there have been some caching issues with files. If it's still not working, drop an email to supportynd@construct.net with all the details as it might be a website bug!
Alright, Thanks!