$FG,5$$TX+CX,"The Grub Master Bootloader"$$FG$ $WW,1$Here are my $FG,2$grub.cfg$FG$ file entries for my SparrowOS partitions. I don't have the patience to do it correctly and GRUB obfuscates. Chain loading is just the normal way an operating system like Windows boots. They do drives, zero-based, and partitions on drives, one-based. They call traditional partitioning a "msdos" partition and I presume, if there is a new way to partition drives, it has a new name. In addition to a Windows and a Linux partition, I have a Primary SparrowOS $FG,2$'D'$FG$, Backup SparrowOS $FG,2$'E'$FG$ and a Transfer $FG,2$'I'$FG$ partition for transferring between Windows and SparrowOS. "hd0" is 1st hard drive, zero-based numbering. "msdos1" is partition #1, traditional msdos partitioning. I keep $FG,2$'D'$FG$, $FG,2$'E'$FG$, and $FG,2$'I'$FG$ identical by frequently copying all files and I use $FG,2$'I'$FG$ to transfer files. They only need to be a couple Gig in size. Every time I copy files, use $LK,"InstallBoot","MN:InstallBoot"$() to $LK,"MakeAll","MN:MakeAll"$ and prepare the partition $LK,"boot sector","FI:::/SparrowOS/Adam/Boot/BootHD.CPP.Z"$ for chainloading by patching the new block address and size of $FG,2$OSMain.BIN.C$FG$. menuentry "SparrowOS D" { insmod chain set root=(hd0,msdos1) chainloader +1 } menuentry "SparrowOS E" { insmod chain set root=(hd0,msdos5) chainloader +1 } menuentry "SparrowOS I" { insmod chain set root=(hd1,msdos5) chainloader +1 }