All the individual topic areas have the ability to post pictures.
Remember posting pictures is not the same as using the browser button to show an image.
When you post a picture you use the [img] tag and your picture needs to be hosted on another site. Using the browser option you use a picture that is resident upon your computer hard drive.
There are a number of free picture hosting sites on the net, but they are normally pretty restrictive on ability to host pictures, i.e., only allowing a limited amount of kb's for hosting; length of use for free before being required to up-grade to a pay for use status, etc.
I simply avoided the entire mess and went directly to http://www.fotki.com/
and paid $30 for a year's subscription of unlimited picture hosting. To me it was worth it because of the amount of graphics I use in my postings.
I don't know if it is in your budget, and please don't think I'm acting like a sales person of/or from Fotoki or anyother pay for use site, but it is something you may want to look into. There are some people there who have 100's of pictures hosted.