Check the scripting index (Help > Scripting Index). The AA will accept a matrix or a list as an input when you create it. So, the easiest way would be to get your Key column as a list, your value column as a list, and pass those to the AA command as the Keys and Values.
If you want to get multiple columns into your Value for a given Key you can do that too. There are some great examples in the scripting guide (Help > Books > JMP Scripting Guide). You can also look at the code I use here: Total Recall: A new strategy for Recall support in JMP applications for some examples on how I work with AA's.
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