Find next empty row and copy and paste information

Hi.

I want to insert some data in a number of cells (e.g. A1, B4, C4 and H8) on a worksheet ('Sheet 1').

I then want to press a button and have some code that:

Looks at column B on 'Sheet 2'
Finds the next empty row
Copies and pastes the information from Sheet 1 into specific cells in that empty row.

Any ideas?

Gavin