I would be happy to post up a YouTube vid on how to do this, I have iPhone not sure if all the apps work the same if anyone needs the vid let me know ....
If you press reply to some one there a bar at the bottom.
Says advanced option just directly on top of key board ,
Press that bar then press the second one down "photo album" that's assuming the pics are in you album!
Then look for the pic click on it then bottom of the pic it says upload too...this forum. Press that , then a box saying maximum should pop up press that , then wait couple seconds for pic to appear in the bottom of advanced options screen. Then you can repeat with all pics , then when your done re press advanced options it will take you back reply screen, you will only be able to see the pics when you press send so don't worry they are there , just write a reply or simply the word pics then send !!
Hope this helps... If anyone needs a vid leme know I will post up on YouTube....