I'm no windows .bat file guru, by any means. But to skip the confirmation try just yanking the prompting lines from the script. Not completely positive but I *think* the backup and restore .bat files provided in 10g are pretty much the same as those shipped in the 11g version.
Might work ... might not. But to achieve the goal ... other than verifying that a backup is indeed good and can be used (BTW that's not the time to ask the question about whether or not there *is* a backup ... ) why make a backup and immediately use it for a restore?