Is your photo already in photos on FB? If it is just select it and once opened press on it for a couple of seconds and you will get an option box to make it your Profile Pic.
FB has just been updated and this is how you will do it now. If you haven't updated FB let us know.
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.