I don't know where this belongs if it's even needed because maybe I'm missing something and people just post links to photos for a reason I'm unaware of. But if you'd like to post a photo inside your post that people don't have to click to see it, here's how:
If the photo is already online somewhere:
1) Right click on the photo
2) Left click on "copy image location"
3) Find the insert image icon in the tools where you're making your Cake Central post. On my computer, it's on the second row and the first icon to the left. When you mouse over it, it says, insert image. It's a little square. And left click on it
4) Right click in the box and hit paste. The image location you copied will be pasted in.
5) Hit "Use URL" and you're done (except it prompts you to choose a size)
If the photo is not online already. Upload it to photobucket (make your account private) or some other image hosting program. Or even Facebook if that works for you. And you then follow the same steps above.