Musraf acknowledge it that kargil attack was pre-planed. He also said that if sharif, PM of Pakistan in 1999, cooperate with army at that time, Pakistan occupied some area of India. After it can India file suit against Pakistan?
Musharraf does not need to be brought into any international courts. He has been arrested and imprisoned in his own country and the crimes he has committed in his own country are quite definitive and the Pakistanis, especially a big number of judges and lawyers will not forget them in any near future. So he will definitely pay for his crimes in Pakistan itself!
Many cases are filed up in International Court of Justice. Many other countries rather than India has filed cases against Pakistan. Such informations are hidden from general public.
I doubt if there any international court ! The best one can do is appeal to the United Nations, but will that really help us ? I doubt it very much since UN is controlled by the USA which has never been fair to India where Pakistan - India affairs are concerned...