Install Linux inside Windows
Install Linux Mint as a Dual Boot with Windows without partitioning using mint4win (not available for Linux Mint 8)
http://duncsweb.com/2009/09/27/mint4win-a-wubi-based-installer-of-linux-mint/
Windows 7 run mint4win in Vista compatability mode
You keep Windows as it is, mint4win only adds an extra option to boot into Linux Mint 7.mint4win does not require you to modify the partitions of your PC, or to use a different bootloader, and does not install special drivers. It works just like any other application.
mint4win keeps most of the files in one folder, and if you do not like it, you can simply uninstall it as any other application.
Boot in to windows insert the Linux Mint 7 LiveCD and you will offered the option of installing inside windows which is where the mint4win installer comes in, you will be asked how many gigabytes you wish to allocate to Linux Mint 7 (I recommend 8gb) then you set a password for your installation then click install and thats it.
Once Linux Mint 7 is fully installed upon starting your PC you will be given a choice of which operating system you want to use Windows or Linux Mint 7
As I have already said mint4win is not available for Linux Mint 8
Linux Mint 7 Download
http://www.linuxmint.com/edition.php?id=38
Linux Mint 7 Gloria User Guide
http://www.scribd.com/doc/15884753/Linux-Mint-7-Gloria-User-Guide
Linux Mint 7 can also be run straight from the LiveCD without touching your Hard drive
LUg.