make logical partition primary
 

I want to be able to boot a dos partition. How can I make a logical partition primary?

hda1 swap
hda5 linux, primary
hda6 vfat, logical (this is the partition I want to put dos on and make bootable)
hda7 vfat, logical

I've searched the forum and haven't been able to find a way to do it, is it possible without reinstalling Linux?

nope. not to my knowledge. u need to re-install to make a logical partition a primary one. logical partitions are defined within an 'extended' partition and i can't think of any tool/program that can do what u need.

Well, you wouldn't necessarily have to re-install, but you would have to back it up to a second partition that will not be affected, or an exterior medium, then fdisk the partition(s), delete the existing extended partition, allocate the new space to a primary partition, edit /etc/fstab to change to the new partition, mount your / partition back up at that point, chroot and bam! You might also need to edit your boot loader to change the partition it's showing for your root partition.

Cool