Lapack FFT - sine transformation - zeros on the beginning and end

Hi,
I have a small question about FFT in Lapack or elsewhere, this is not related to Lapack/MKL really. I have a array of data I wish to transform. But I can't use exponential FFT, I need to use the sine trigonometric transformation. The algorithm wants from the that the array of data begins with zero and ends with zero.
f(0)=0
f(n)=0

But my natural data are not of such kind. Can I do this? : My array A length is m. I will create an array F which has length n=m+2 and I will copy the array A into F. I will define F(0)=0, F(1:m)=A and F(n)=0
Will it work? Will be the transformation right?
And then after the transformation, the transformed F, what should I do? Now I would like to have the values in A but the lenght of A is smaller than F. Can I copy A=F(1:m) and the points F(0) and F(n) not use? Will the array A than the sine FFT of A at the beginning?
I hope so but I'm not sure if I'm not mistaken.
Many thanks