If you are talking about favorites in Internet Explorer it is easy.
Go to the file tab, then select import and export.
Now select export to a file.
select what you want to export - favorites/cookies/feeds.
The favorites folder will be highlighted by default.
The next default will transfer your favorites to "My Documents".
Now the file containing all your favorites etc. will be in "My Documents".
Copy the files/folders onto a disk and save for after the fresh install.
After the new install, copy the files to "My Documents" and reverse the process by selecting the same path as before, but now you will be importing.
I hope this helps.