I was wondering since I use Macrium reflect to keep a full backup image, I name them as Backup- MM/date/YYYY. I was wodering if I could go to folder location and rename one as Backup-MM/dd/YYYY-Pre sp1 without it effecting the installation of the backup if needed.
Try renaming it, open Macrium, click restore tasks, see if it "sees" it.
I've done this, changed the name in the .xml file and the .xml's actual name and Macrium "saw" them all.
I didn't reload the image though, so if it actually works......
EDIT, Just realised, that's not really an answer!!