Let's say you start with this:
You can create another worksheet. In cell A1, type = to start a formula, open the other worksheet, and click on the cell you want to be in the upper left. The formula will look like =Sheet1!A5, assuming "Sheet1" is the name of the worksheet with data and cell A5 is the first one you want.
Then, with cell A1 selected, select as many to the right as the columns you want. Hit CTRL-R to fill to the right. Select down as many rows as you want and hit CTRL-D to fill down.
Use this worksheet when you import.
If you want to just fill down a bunch of rows without worrying about the number of rows on worksheet 1, you can do this:
=IF(LEN(Sheet1!A6)>0, Sheet1!A6, "")
It will give you a blank cell if the reference cell doesn't have any length.