I had a Time Machine backup of my computer with Leopard - it was about 45 GB. Then I did a clean install of Snow Leopard. But the thing is, when Snow Leopard backed up, since it was a clean install, it backed up everything again, so now I basically doubled my usage of my Time Capsule and all the pre-Snow Leopard stuff I don't really need. Is there any way to delete a portion of the backup?