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(把每个xp的ntldr分别改名成ntldr1~ntldrt4) 
(把每个win7的bootmgr分别改名成bootmgr1~bootmgr4) 
 
title [] Windows XP (一) 
set bootfile=/ntldr1 
find --set-root --devices=h %bootfile% 
map () (hd0) 
map (hd0) () 
map --hook && find --set-root --devices=h %bootfile% 
chainloader (hd0,1)%bootfile% 
 
title [] Windows XP (二) 
set bootfile=/ntldr2 
find --set-root --devices=h %bootfile% 
map () (hd0) 
map (hd0) () 
map --hook && find --set-root --devices=h %bootfile% 
chainloader (hd0,1)%bootfile% 
 
...... 
 
title [] Windows 7 (一) 
set bootfile=/bootmgr1 
find --set-root --devices=h %bootfile% 
map () (hd0) 
map (hd0) () 
map --hook && find --set-root --devices=h %bootfile% 
chainloader (hd0,1)%bootfile% 
 
title [] Windows 7 (二) 
set bootfile=/bootmgr2 
find --set-root --devices=h %bootfile% 
map () (hd0) 
map (hd0) () 
map --hook && find --set-root --devices=h %bootfile% 
chainloader (hd0,1)%bootfile% 
 
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