Models for Discrete Choice in R

Hi,

I would like to fit Logit models for ordered data, such as those
suggested by Greene (2003), p. 736.

Does anyone suggests any package in R for that?

By the way, my dependent variable is ordinal and my independent
variables are ratio/intervalar.

Thanks,

Iuri.

Greene, W. H. Econometric Analysis. Upper Saddle River, NJ: Prentice Hall, 2003