yes, but you need to do that from a pc with linux
http://www.slackware.no/makeSlackISOs.sh
if you want a usb stick here's a tutorial made for my blog:
# mkdir slackware
slackware64-current:
# rsync -r -a -v --delete --progress --stats --exclude 'source' --exclude 'extra' --exclude 'testing' rsync://rsync.slackware.at/slackware/slackware64-current/ ./slackware
slackware-current:
# rsync -r -a -v --delete --progress --stats --exclude 'source' --exclude 'extra' --exclude 'testing' rsync://rsync.slackware.at/slackware/slackware-current/ ./slackware
# fdisk -l
my usb stick is /dev/sdc
# dd if=/dev/zero of=/dev/sdc bs=8M count=1
# fdisk /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xacdb6963.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won’t be recoverable.
Warning: invalid flag 0×0000 of partition table 4 will be corrected by w(rite)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1016, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-1016, default 1016):
Using default value 1016
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 83
Command (m for help): a
Partition number (1-4): 1
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
# mkfs.ext3 /dev/sdc1 -L USB
# find /usr -name mbr.bin
/usr/lib/syslinux/mbr.bin
# dd if=/usr/lib/syslinux/mbr.bin of=/dev/sdc
# mkdir /media/USB
# mount /dev/sdc1 /media/USB
# cp -rvp ./slackware/* /media/USB
# mv /media/USB/isolinux /media/USB/extlinux
# mv /media/USB/extlinux/isolinux.cfg /media/USB/extlinux/extlinux.conf
# rm /media/USB/extlinux/isolinux.bin
# extlinux -i /media/USB/extlinux
# umount /media/USB
and when you install select “Install from a hard drive partition“, type "/dev/sdc1", press enter, then type "/slackware64" for slackware64-current, or "/slackware" for slackware-current.