when you post a reply look above where you put your message, you will see 2 rows of icons etc.....on the top row far right where the youtube sign is count 6 along from the end and touch on it...it will say HOST AN IMAGE, click this and a box will appear, click where it says BROWSE and it will display your photos on your computer, choose which photo you want and DOUBLE CLICK on it........the picture code will appear along side browse, now click HOST IT and 3 codes appear, copy the middle one IMAGE then if you just take your curser out of the box onto your post and click your mouse you can now paste the code onto your post.....then click send as normal.
its a bit fiddley until you get the nack of it but its fairly quick once you've mastered it, the alternative is copy and paste the IMG code if you have a photobucket album.