I have not ever needed to restore using my Acronis10 backups - but as I understand it, from the Acronis User Guide - one chooses a Incremental backup by its creation date/time. Thus, you can roll back the disk state to a certain date.
I quote "To restore data from an incremental backup, you must have all previous incremental backup files and the initial full backup. If any successive backups is missing, restoration is not possible."
So from this I would assume that you start your restore with whichever incremental backup you choose, and the full initial backup will be included in the process automatically.
No doubt, if I have mis-interpreted the Guide, someone will soon come on and say so.