I would like to download UBUNTU OS onto a 4GB flash drive just for general purposes. I know it takes at least 2GB of free space so i have that checked. I am currently waiting for download to be complete. I have also already downloaded the UNetbootin app you need to install UBUNTU. But what do i exactly do next?? From what i know i extract UBUNTU WinRAR files or whatever onto flash drive and use UNetbootin to setup right? I plan to change the boot order in boot menu to start from USB drive so it will run UBUNTU and i can switch back to my normal Windows 7 64-bit (on HDD) whenever i feel. Any guidance on how to do the operation correctly without wasting my time??? This is like the third time ive tried this.