Yes, you can export a set of conditional formatting rules from one worksheet and import them into another worksheet in Excel 2007. Here are the steps to do so:

1. Open the worksheet that contains the conditional formatting rules you want to export.
2. Select the cells that have the conditional formatting rules you want to export.
3. Click on the "Conditional Formatting" button in the "Home" tab of the ribbon.
4. Select "Manage Rules" from the drop-down menu.
5. In the "Manage Rules" dialog box, select the rule you want to export and click on the "Export" button.
6. Choose a location to save the exported file and give it a name.
7. Repeat steps 5 and 6 for each rule you want to export.
8. Open the worksheet where you want to import the conditional formatting rules.
9. Select the cells where you want to apply the conditional formatting rules.
10. Click on the "Conditional Formatting" button in the "Home" tab of the ribbon.
11. Select "Manage Rules" from the drop-down menu.
12. In the "Manage Rules" dialog box, click on the "Import" button.
13. Navigate to the location where you saved the exported files and select the file you want to import.
14. Repeat steps 12 and 13 for each file you want to import.
15. Click "OK" to close the "Manage Rules" dialog box.

Your imported conditional formatting rules should now be applied to the selected cells in the new worksheet.