I pm'd Kei and asked her how I put a post into multiple pages. This is what she said:
To break up a post into pages, all you have to do it put in a Break tag. To do so, all you have to do is type the following: [ BREAK ] (without the spaces). Put that in where you want a page break to occur and when you upload it, it'll be on a separate page.
Hope that helps.
Best,
Kei
"I adore children. A little salt, a squeeze of lemon--perfect." -Harry Dresden