I want to take multiple lists of numbers, all in one column separated
by blank rows, and "concatenate" the values at the beginning of each
list in the adjacent column. (I have been using MultiCat (http://
www.mcgimpsey.com/excel/udfs/multicat.html), but can't seem to get it
to be automatic--I don't want to have to customize the formula for
each list, I just want to run a macro or drag a formula).

Example:
A B
1 1, 2, 3, 4, 6, 8, 10
2
3
4
6
8
10

1 1, 2, 8, 9
2
8
9


etc.

These are page numbers that are in colum form, and needed to be
converted into a "1, 2, 3" form. I would like to be able to do this
automatically by dragging a formula or with a macro.

Thanks!