it seems that many people want the full functionality of hydrogen on windows machines. if it is originally designed to work on linux, why not just download ubuntu linux?
a few reasons:
1. its free
2. doesn't take very much space
3. use hydrogen to its full extent
you can download ubuntu at www.ubuntu.com. i assume that you don't want to replace your windows operating system. you can install ubuntu on a flash memory device like a usb stick, sd card, or cf card. i have ubuntu installed on an 8 gb usb stick and on a 5 gb cf card.
whenever you want to boot ubuntu to use hydrogen, restart your computer and run bios setup. change the boot sequence to start with usb. (if you install ubuntu on an sd or cf card, you will have to use a usb card reader)
after changing the boot sequence, restart your computer and ubuntu will boot. once you get there, you can download and install hydrogen.
to get back to your windows operating system, you can either change the boot sequence each time (which will be a hassle) or just keep the sequence in this order: 1. usb 2. internal hdd. this way, if you disconnect all usb storage drives from your computer, your computer will skip booting from usb and proceed to boot from your 2nd choice, the internal hard drive.
it may sound difficult, but it really isnt. if you have any spare computers laying around, i would recommend dedicating one entirely to linux/ubuntu.