Vista - Grub NST folder deleted -cannot boot into linux

Hi.
I'm currently dual booting with Vista and Backtrack 3 (a slackware linux distro) using grub and Easy BCD. The other day I deleted the 'NST' folder in my Vista c:\ and now i cannot seem to boot into Backtrack 3 as there was info in that folder that must have been used.
For some reason now, EasyBCD will not let me add another entry to my bootup so I need those old files that were in my NST folder.

MBR looks like this for the BT3 bootup portion:

Entry 3
----------------------------------------------------------------------------
Name: BACKTRACK 3
BCD ID: {d9d43170-6007-11dd-8b43-8943620ecd66}
Boot Drive: C:
System Bootloader: \NST\nst_grub-5F6A92CF71032E4FDDA8EB8D0E76CEC9.mbr

could someone please help me as i need to add some folder/file to my c:\ for BT3 to bootup now. What exactly did the nst_grub-5F6A92CF71032E4FDDA8EB8D0E76CEC9.mbr file contain?

thanks

problem solved.
when I created the entry EasyBCD would create a new NST folder in the c:\program files\easycbd\boot\nst
I just created a new entry, copied that folder to c:\ and renamed the file to nst_grub-5F6A92CF71032E4FDDA8EB8D0E76CEC9.mbr and it worked