How can I have guest OS Snow Leopard and Windows 7 running on my MacBook Pro with OS Lion using Virtual Box?
did you try any of the solutions Mike suggested? Please let us know what worked for you. Thank you!
By installing Virtual Box and configuring two Virtual Machines for those Guest OSes?
download Virtual Box at the following link
head over to the manual about creating your first VM
Follow the Wizard and select the source of your Windows 7 installation which can be either a disk image or the actual Windows 7 DVD in your optical drive.
(Win7) for better compatibility I suggest to configure an Intel Pro 1000 Desktop network card
If a driver for this card is needed ~ I'm not sure for Windows 7 ~ you can find it at Intel
To get the driver "into" Windows you will have to either use a USB Stick
or create a Shared Folder
One limitation you have to keep in mind is that Virtual Box officially only supports Mac OS X Server as a guest operating system!
The only way I know of installing the client Snow Leopard version is the same used for a hackintosh setup with Chameleon or iBoot.
The final answer as to why I am using so much links is that you could have found all and every piece of that information in the official Virtual Box manual on their website or on your computer after installing the software.