unavailability of undo system restore in W7

I was writing scripts in batch file......But after some time, explorer start crashing repeatedly n frequently, so i had to do the system restore in safe mode.....After system restore, i lost my batch file,which is very important. So i wanted to undo the restore, but it is not available, i don't know why? So plz help me either undoing the system restore or how to get my batch files... plz help...

For technical reasons a System Restore done in safe mode cannot be reversed. All files of any importance need at least one backup copy while those of particular importance need 2 or more backup copies.