Here again you demonstrate your lack of understanding. A tiger mating with another cat, etc..... Again that's not how it works! If it were, then of course you silly creationists could be looking for Fronkeys and Crocoducks. Unfortunately that's just not how it works. Why would that have to be a crucial component to evolution?
Every creature carries DNA. DNA can mutate. If that mutation, however small benefits that creature in its present situation and surroundings, then it's more likely that he will get the opportunity to mate and have offspring. His offspring will be more likely to carry that mutation. Fast forward a few hundred generations. Assuming their situation (ecosystem, food, temperature, etc) hasn't changed, the majority of these creatures are more likely to carry this mutation. Sometimes these mutations and their specific carriers will pass on other traits too. These will be carried along. This is continually happening. You accept this, yes? It's is micro evolution. "Major" evolution as you call it is known as Macro Evolution, or Speciation. Speciation simply occurs when enough of these changes has happened to render the creature to be of another species. It may not even be recognizable. It's gene pool may be too far separated from its ancestors to even successfully mate! As all creatures are evolving together at their own pace, this is even more likely.
If you were to look at a tiger's history, it would likely share ancestors with many other cats. The cats in between the ancestor and the tiger may look exactly like that ancestor cat, or may look more like a tiger. The end goal was not the tiger, but a cat better suited to its environment. We just happen to call it a tiger, and it happens to live at the same time as we do. It's ancestors may have been called something different if it were to be alive today. Does that make sense?
Speciation occurs when a species has changed enough from its previous form that it is recognizably different. You cannot.. CANNOT have micro evolution without macro evolution. If you accept one, you have to accept the other. Just because you don't see it in front of your eyes doesn't mean it doesn't happen. You just don't happen to live long enough to see most species change like that. The fossil record documents this well with some species.
Pall of the points you have brought up have been poor. They are all easily explained. Your ignorance is frustrating, but if you are willing to have an open mind many of us are willing to continue this debate. Go ahead and comb your favourite creationist books (no WT please, they are just stupid) and bring out your best arguments. Many will hurl insults at you because your ignorance is frustrating, but remember we all once believed this crap as good little Dubbies too. Your demeanour could change a bit, too though.
I hope that answers some of your questions. If not, please draw out what doesn't make sense and we will try to explain better. It would be easier for you to go read a damn book, but that doesn't seem likely.
