Then I'm afraid you have to do it the hard way.
BTW the stuff in peej's reply is BBcode which is what you use in the forum. Html is used in blogs its very similar and apart from the fact that html uses "< " and ">" to start and finish code elements (tags) and BBcode uses "[ " and " ]" much of the simple formatting is the same. Attachments are also not used in Blogs I guess he misunderstood your query.
There is a thread 'writing a blog'
: click here : which covers it but its all fits and starts with lots of other stuff apart from photos.
The bad news is basically you have to use html even just to start and end a paragraph let alone insert a photo, the good news is once you've done it once you can do it again. I never remember it I just cut and paste what works.
I'll stop there except to ask where are the photos that you want to display? On your PC, in an MHF album, somewhere else on the web?