Rhododendron,

I'm sorry to hear that your wedding was dominated by your MIL's wishes, not your own.
I agree with what TrustingmyLord said about much of the wedding being fluff.
However, if you are truly unhappy with the pictures, I can understand that you want to do it all over again - or do what JustBeachy suggested, just have nice pictures made of your husband and you.
I was very happy about our wedding despite it being fairly low budget, but I was unhappy with the pictures my sister-in-law had made: the ones in church were too dark and almost all from behind, and we weren't even in the pictures she made at the reception - all she had done was photograph the guests, not us! As a result, we didn't have good pictures of us in full length (SIL mostly made close ups from our faces) - which I as a bride found disappointing as I loved my dress and bouquet etc. I had trusted my SIL with the pictures because she's a good photographer with good cameras etc.
So as soon as we found out that the wedding pictures were bad - this was about a week after our wedding - we asked my uncle (an even better photographer, and a better listener) to do a photo session in my parents' lovely garden. (We were too poor to pay for a professional - and my uncle's pictures are as good as a professional's.) Husband and I looked exactly the same as on our wedding day, but now we were on it from head to toe instead of from head to shoulders.
I'm very glad that we did it - they feel like our real wedding pictures to me. But I did wear the same dress as on our wedding day, and it was only a week later. Also, most people don't know that the garden pictures are taken a week later instead of on the day itself (although I don't lie about it). We had to tell my SIL and she was offended, but she soon got over that.
I can't guarantee you that you will feel the same as I do about my "second round" wedding pictures - because of the time passed, and because other people have seen your original pictures with a different dress. But in my experience, people's memories aren't really that great, so maybe it will work. If you want other pictures because you don't want others to think less of you, that's not a very good reason to have them redone I think. But if you want other pictures because you want it for yourself - because you want to feel happy when thinking of your wedding day - then it's OK IMO.