Grub4dos Installer 1.1 Zip
Grub4dos Win 10
I installed Windows XP on a VMware virtual disk with NTFS. From NT bootloader (boot.ini) I could start a well working grub4dos. So I made another virtuel Windows XP and this time I used FAT32 (fast) format for the XP installer. This time I am getting missing MBR-helper? (With grubinst-1.1-bin-w32-2008-01-01.zip and grub4dos directly in MBR it`s also working, but I want to start from NT bootloader.) What`s the problem?
How can I solve it? You did not have a clear description on the line used in BOOT.INI, but I am guessing you might have employed the GRLDR.MBR. The usage of GRLDR.MBR in BOOT.INI is undocumented and only some GRLDR.MBR versions could be used in this way. 
Only those GRLDR.MBR files that have exactly 8192 bytes in size can be successfully used in BOOT.INI. You should use GRLDR instead, as mentioned in the readme, just like this: C: GRLDR=.