How to do such MDS in R

i know cmdscale and isoMDS inR can do classical and non-metric MDS.but 
i want to konw if there is packages can carry on "individual 
differences scaling" and "multidimensional analysis og 
preference"?both method are important one,but i can not find any clue 
on how to do it using R.
anyone can help?
thank you!

It may be that individual differences scaling is not available in R. 
The classic piece of software for this purpose is SINDSCAL. It is 
beautiful Fortran (although this sounds like contradiction in terms), 
and it would be easy to port the software into R, but I think the 
license does not allow this. The hardest bit would be to change the 
output into R. I suggest you dig up SINDSCAL somewhere -- it could be 
in netlib -- and compile it yourself. Gnu g77 is quite OK.

cheers, jari oksanen
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Jari Oksanen, Oulu, Finland