HexCheat:
 Using your Diskedit or any other hex editor search out the 
 bytes at the offsets (in hex) 27,28 and 2B,2C these two 
 pairs should hold the same values. 
 You should change each pair to the same value. 
 Let's say, your bytes at 27, 28 are FE 03 then to move a 
 few steps to the left (and past some irksome door) you will 
 edit them about 6 less to make F8 03.  
 If you want to move to the right, you just add 6.