You can specify whether the principal components enter the regression based on the magnitude of the eigenvalues or on the magnitude of the correlations between the dependent variable and the principal components. The resulting coefficients are reported in terms of both the principal components and the original or standardized variables.
Ridge regression deflates the multiple correlation among the independent variables.
You can control the amount of ridging. Specify a variable containing the case frequency. A case frequency has the effect of repeating cases. Specify a case weight variable. Records with negative or zero case weight values are excluded from the computations.