VortexBox 2.4 (for 64 Bit Processors only) is released as a USB boot image. We will be releasing it in more formats as time goes on. To install it on a target PC first you need to download the image, unzip it onto a Fat32 USB key, and make it bootable. VBA 2.4 is based on Fedora 23 so compare processor and MOBO requirements to Fedora 23. Minimum Requirements: Processor 1 Gigahertz x86_64, RAM 1 Gigabyte, Operating System 10GB HDD space, Video 800 by 600. Recommended for VBA: RAM 2 to 4GB RAM, 30GB OS partition.

Here are some instructions on how to do that.

Installing i386 images on a USB key

Once the image is installed you need to expand the root partition and then fill any remaining drive space with a /storage partition.

more info on that here

Installing VortexBox 2.3 or VortexBox 2.4 from an image