Source:
http://www.syter.com/us/index.php/tutorials/59-install-slax-linux-7-in-virtualbox
I succesfully installed Slax 7 on my HDD using the ./bootinst.sh command then, on boot, the system was unable to boot from the HDD. I found that when this error occurs, it is needed to change the SYSLINUX bootloader with another version (don’t know why).
I tried the one suggested in the other post and it worked fine.
To install the bootloader we’ll use the extlinux utility (the synopsis says that it works on ext2 / ext3 filesystems, I was on an ext2 fs).
Download syslinux-4.06.tar.gz and bring it into a newly created folder of the hdd. Then
tar xvf syslinux-4.06.tar.gz cd syslinux-4.06/extlinux ./extlinux --install /media/system/slax/boot/
Remember that my hdd was labelled “system” and (automatically) mounted on /media/system/
pirraste.wordpress.com 
yos
2013/10/29 at 11:26
how have you automaticaly mount your boot device on /dev/system normaly alredy monted on /mnt/live/memory/data ?
thanks
yos
pirraste
2013/10/29 at 12:48
SLAX is phisically installed on the HDD (see this link as a sample).
If I can remember well (I have not that pc with me) the mount command was into the “/etc/rc.d/rc.local” file.
Pstuwx
2015/02/12 at 05:13
Hi.i would like to know how to install Slax 7 on a windows xp computer. Thanks
pirraste
2015/02/12 at 09:42
This is the start point: http://www.slax.org/en/documentation.php
Be sure you know what you’re doing: you’ll wipe your existing WinXP installation. Maybe you can try SLAX from an USB device before using.
Petr
2016/02/25 at 09:47
probably right directory is syslinux-xxx/bios/extlinux , but in my case it does’n work anyway