I would think you can do the following:
1) Open Excel
2) Open the VB Editor
3) Go to your macro in the Personal folder (whichever module it is) and press Ctrl A. This will select all info in the module. Once selected, copy it
4) Open the spreadsheet you want the macro to be in
5) Go to the VB Editor and add a module to that spreadsheet
6) In the Code Module, paste your copied code
7) Save the workbook that you want to distribute (this will save the macro too)
I hope that helps = )