The objectives of my ongoing work are (1) examining construct validity (2) factorial validity, and (3) cross validation with multiple independent samples in a single country context. For measurement models I have a multidimensional construct, but the existing research suggests  that there are either three or  four factors construct each with the supporting theory.  The results are very much national culture specific. I have tried with three dimensional CFA, the model fit seems to be moderate. 

If I am correct, I have to do a nested comparison with multigroup analysis, I am somewhat apprehensive  about the way to start in AMOS. Can you please suggest, how should I go about developing the model in AMOS graphics?  and please provide me with some tips on the nuances of nested model building and evaluation in Amos. 

Note: All these factors were first order factors.

I would be happy to clarify on my questions.

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