I have had 0% success in booting through USB stick for any mcafee software failure and recover.
Please let me know the procedure you have been following for recovery.
Please can you tell us what product you are using, what version, what procedures you have followed and what error messages you have encountered so we can best process your post.
Have you tried this? EZPE32 - Data Recovery Builder
Might be what you are looking for.
Retrieving data ...