Thank you very much Lal, Akvan and y not for your answers and contributions.
Akvan, I am very glad to see your reply to my question. You are one of the forum participants whose inputs I really value as it is always refreshingly useful and insightful. Of course, this is not forgetting the valuable contributions of Lal and Seng Kiat who are the keymaster and moderator respectively.
Lal, I agree that at least initially it is not possible to control what kind of cetasikas arise as the cittas arise so rapidly. However can kamma beeja be altered, or if not, at least have its effects modified by other kamma beeja?
For example, suppose I wish to sponsor the printing of Dhamma books for free distribution. Before the actual act, days in advance, I may wish simply to have the Dhamma books bring niramisa sukha to readers and eventually liberate them from samsara.
However, on the actual day itself, I may inadvertently start hoping that such an act will give rise to a future rebirth for me as a wealthy householder. Should I become aware of such a thought, I could immediately think of how worldy wealth in and of itself has anicca, dukkha and anatta nature if it binds one to the thirty-one realms, abandon the thought and think of thoughts of having all sentient beings being liberated from samsara. In the days after the act of giving, I may also sincerely wish for the benefit of all sentient beings.
In this way, can kamma beeja done at the very moment of an act have its effects modified by future and past kamma beeja, even if it is the kamma beeja grasped at the cuti-patisandhi moment?