So something that is infinite is impossible.... but you're totally happy with the idea that god is 'eternal'?
No, an actual infinite is impossible. An actual infinite is a infinite temporal regress of events which is bound to time. a causes b causes c causes d causes e causes et cetera on to infinity. That's what is impossible. the whole idea of one thing causing another into existence, and changing and causing another into existence is bound to time.
The concept of God on the other hand is not bound to time. If God DID create the universe, and CREATE time, the only logical conclusion is that He is outside of time. (Im not changing the definition of God here...)
So yes... actual infinite bound to time. uncaused caused is not bound to time, since it created time. Thus the concept of God is not an actual infinite.
I ask Godmil and PatrickJameson... is there a first cause to the universe? an uncaused cause? from which all other causes come? (Im not saying that the cause is God, Im just asking IF this cause exists.)
Here is another argument, used in conjunction with Thomas Aquinas'. Please note I dont fully understand ALL of the terms used here.

it's quite a mouthful.
1. Whatever begins to exist has a cause of its existence.
2.The universe began to exist.
2.1 Argument based on the impossibility of an actual infinite:
2.11 An actual infinite cannot exist.
2.12 An infinite temporal regress of events is an actual infinite.
2.13 Therefore, an infinite temporal regress of events cannot exist.
2.2 Argument based on the impossibility of the formation of an actual infinite by successive addition:
2.21 A collection formed by successive addition cannot be actually infinite.
2.22 The temporal series of past events is a collection formed by successive addition.
2.23 Therefore, the temporal series of past events cannot be actually infinite.
2.3 Confirmation based on the expansion of the universe.
2.4 Confirmation based on the thermodynamic properties of the universe.
3. Therefore, the universe has a cause of its existence.
4. If the universe has a cause of its existence, then an uncaused, personal Creator of the universe exists, who sans creation is beginningless, changeless, immaterial, timeless, spaceless, and enormously powerful and intelligent.
4.1 Argument that the cause of the universe is a personal Creator:
4.11 The universe was brought into being either by a mechanically operating set of necessary and sufficient conditions or by a personal, free agent.
4.12 The universe could not have been brought into being by a mechanically operating set of necessary and sufficient conditions.
4.13 Therefore, the universe was brought into being by a personal, free agent.
4.2 Argument that the Creator sans creation is uncaused, beginningless, changeless, immaterial, timeless, spaceless, and enormously powerful and intelligent:
4.21 The Creator is uncaused.
4.211 An infinite temporal regress of causes cannot exist. (2.13, 2.23)
4.22 The Creator is beginningless.
4.221 Whatever is uncaused does not begin to exist. (1)
4.23 The Creator is changeless.
4.231 An infinite temporal regress of changes cannot exist. (2.13, 2.23)
4.24 The Creator is immaterial.
4.241 Whatever is material involves change on the atomic and molecular levels, but the Creator is changeless. (4.23)
4.25 The Creator is timeless.
4.251 In the complete absence of change, time does not exist, and the Creator is changeless. (4.23)
4.26 The Creator is spaceless.
4.261 Whatever is immaterial and timeless cannot be spatial, and the Creator is immaterial and timeless (4.24, 4.25)
4.27 The Creator is enormously powerful.
4.271 He brought the universe into being out of nothing. (3)
4.28 The Creator is enormously intelligent.
4.281 The initial conditions of the universe involve incomprehensible fine-tuning that points to intelligent design.
5. Therefore, an uncaused, personal Creator of the universe exists, who sans creation is "beginningless," changeless, immaterial, timeless, spaceless, and enormously powerful and intelligent.
I know certain parts are going to be pointed out as "impossible", so I will make my responses to those points already.
4.11 The universe was brought into being either by a mechanically operating set of necessary and sufficient conditions or by a personal, free agent.
4.12 The universe could not have been brought into being by a mechanically operating set of necessary and sufficient conditions.
4.13 Therefore, the universe was brought into being by a personal, free agent.
This might seem like a jump from 4.11 to 4.12, but think... if the universe was caused into existence by a set of conditions... what caused these conditions? perhaps they were caused by other conditions, et cetera. we're back to the actual infinite. conditions causing conditions causing conditions, which is impossible. so we can conclude that conditions causing the universe (conditions meaning a natural cause to the universe) is an impossibility in and of itself.
So is there a first cause to the universe? If not, we come to an actual infinite of events, with no beginning, which has been proved impossible. If there is a first cause to the universe, it must have not been caused by anything else. It must BE cause in and of itself.
Another interesting point is that long before this argument was known to man that the Judeo Christian Islamic God claimed... "I am who am". A cause which IS cause.
I really just wanted to get my points out here...
EDIT: Oh, and LOL at Kirjava and that other guy. hehehehe. that was really funny.

xD