Hi 0705,
Well, I usualy use Mcad to design the inicial opamp parameters, as gm of the dif. pair and compensation capacitor due to noise. Also the gm of the ouput stage, due to stability. This gives the inicial values of current in each branch and the values of W/L.
After this step, I take Hspice to fine tune the design and test for corner parameters.
I do not have a general program. For each type of amplifier I use a diferent mcad file.
I know that barcelona design is a good tool for this propose, maybe you can check that.
Regards bastos