windows7中添加linux启动项

我电脑是安装三系统的，先安装XP，然后linux，最后是7，安装WIN7时，会自动添加了XP和linux的启动项，XP和win7的都可以进去，但是就是linux不行，提示找不到： \NST\nst_grub.mbr
用EasyBCD添加，亦是无济于事。提示找不到 \NST\nst_linux.mbr。
这是我在EasyBCD看到的，希望对解题有用处：
There are a total of 4 entries listed in the bootloader.Default: Windows 7Timeout: 1 secondsEasyBCD Boot Device: C:\Entry #1Name: Windows XP Professional SP3BCD ID: {ntldr}Drive: C:\Bootloader Path: \ntldrEntry #2Name: Windows 7BCD ID: {current}Drive: G:\Bootloader Path: \Windows\system32\winload.exeEntry #3Name: Red Flag Linux Desktop 7BCD ID: {a902a5aa-67b8-11e0-b1bd-0019db8102ae}Device: bootBootloader Path: \NST\nst_grub.mbr
There are a total of 3 entries listed in the bootloader.
Default: Windows 7Timeout: 1 secondsEasyBCD Boot Device: C:\
Entry #1
Name: Windows XP Professional SP3
BCD ID: {ntldr}
Drive: C:\Bootloader Path: \ntldr

Entry #2
Name: Windows 7
BCD ID: {current}
Drive: G:\Bootloader Path: \Windows\system32\winload.exe

Entry #3
Name: Red Flag Linux Desktop 7
BCD ID: {a902a5aa-67b8-11e0-b1bd-0019db8102ae}
Device: bootBootloader Path: \NST\nst_grub.mbr

用EasyBCD添加的Linux启动项：
Entry #4
Name: NeoSmart Linux
BCD ID: {d4c0997d-074d-11e1-b82d-d54c1af18113}
Drive: C:\
Bootloader Path: \NST\nst_linux-C3E070D2A4286C6C802094965DF0C656.mbr
麻烦懂得才来！！！！

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