Is there an equity calc program that supports weighted had ranges?

[w_alloy]

Title says it all. Pokerstove is awesome but in all forms of poker oponents' hand ranges usually consist of weighted distributions instead of 100% this and 0% that. The stove can be used to approximate weighted ranges by including and excluding similiar hands (like put in 98s instead of 98 if you want to discount it, or put in only 1 of the 2 possible straight draws if he sometimes folds these hands pre), but this method is often inacurate and very tiresome.

If there isn't one, how hard would this be to code? It seems like this is a really essential game eval tool that would be usefull to all players wishing to improve their games, and that this wouldnt be that hard to create.