I started using a program called Gimp to make my bos pages. It's a free art program. Now I use a combination of Photoshop and Paintshop, which can be fairly pricey programs I guess. I find art programs to be better than MS word. You can customize your pages easier in art programs and get into more detail with them. Basically, it's whatever program works for you though. Some are easier to use then others, but some are also more limited then others on what you can do with your pages.
Along with GIMP as an image program, there is Open Office for a writing program, which is free. You can find it at openoffice.org. They also have a drawing program, etc. It can open any MS Office file, and it can save files in MS office formats. Give it a try. I love it. :)
I use open office myself. Never tried their drawing program, but I write a lot of short stories and fan-fiction with their writing program.