install from mounted iso

[Master of Reality]

So I have a USB drive i want to install slackware on. I have the isos mounted on my machine. Should there be a setup program (like when you boot the CD) to start an installation somewhere in the image?


Actually the reason i want to be able to boot off this USB drive is so i can install Slackware on another machine. Would there be a way to put the iso images on the USB drive and boot from them so that i dont have to install slackware on it?

(and i dont have a cdrom or floppy drive)