acceptance of an intelligent being would influence how?
It depends on how this being influences stuff. If it periodically stabs wicked people in the chest - then it might affect forensic science inquiry if the consensus of forensic scientists is convinced it exists. This is a psychological effect rather than a logical one.
would it negate evolution? (by the above assertions, no.)
It depends whether or not said intelligence is involved in the diversity of life as to how much the science of evolution would be affected.
would it negate the big bang?
That depends on what influence the entity has over the geometry of space/time.
If said entity has no influence upon the thing being studied - then it cannot affect the study of that thing. If it does affect the thing being studied then it has the possibility of affecting study.
my point of argument is to show that if science admits to an intelligent being being first, that science is only proof of the "how" of God, and no explanation of "why" of God.
Indeed - many scientists hold this position. For example, to differentiate from creationists, some people call themselves theistic evolutionists. A lot of the time, they simply say evolution was how God did it. Occasionally, the idea that god 'tweaks' things along from time to time creeps in. Normally it doesn't affect the science that is produced by these people, but I do think it devalues the god they believe in: after all either god pings it all into existence and doesn't need to make any changes other than to account for the actions of beings with free will OR god creates a wonderful algorithm that beautifully creates that which it willed in the first place. Any god that has to tinker with its creation to get it going in the direction it wants seems inferior to me.