R help - Mar 2007 - differences among time points Using manova

How I test for differences among time points without assuming
parallelism, With a profile analysis model, Using manova R function.

For example, with Potthoff and Roy data (Potthoff and Roy 1964) how
I can test

H: ABC=0,

when

A<-diag(2)

and

C<-rbind(diag(3),rep(-1,3))

(Davis, 2005 p.p 81 ).



I have the SAS code but I want to do it with R, of course.

Thank for your help.