original title: Hebrew Language with US keyboard?

I am confused. Yesterday I installed the Language Bar on my Win XP system. I normally use English and want to enter Hebrew words and some Greek too. So when I installed the Language Bar, I also installed Greek and Hebrew, and in the process, (I'm not exactly sure what I did, but I got two keyboard options under the Hebrew Language, one for Hebrew and the other for US. So after trying it out, I realized that the Hebrew keyboard has all it's letters in different places from my US keyboard. So when I push an A I get a Shin, etc. So I thought I would try the US keyboard for the Hebrew language, but I no longer got Hebrew letters at all.

First Q: what is the US keyboard good for under the Hebrew Language. And how is that different from just using the English US keyboard.

Second Q: How do I get it so that when I push A I get an Aleph, B for Beit, G for Gimmel? Wouldn't that be what one would expect with a "US keyboard" under the Hebrew Language?
(And of course Tet, Tsade and finals, etc. will be some other keys like J and X etc.)