Windows 7: Need help with formatting and reinstalling Windows-7

I have a Toshiba laptop that came with a preinstalled copy of Windows-7 (64 bit) version purchased in July 2010. No setup disk came with the laptop, but there is a "Toshiba recovery media creator" utility. Now, I want to format my laptop, and here I have few queries regarding this:



[1] What is the better option for formatting my drive? Should I use the Toshiba media-creator or install a clean version of Windows-7 from an ISO download (am I allowed to do that? If so, what is a good site to download?) There is a "sticker-certificate" on the bottom of my laptop with a product-key. Will it work with the new install?

[2] Do I have the option of installing a 32-bit version of Windows-7 instead of 64-bit with the above license? The reason is that most applications I use are 32-bit and hence a 32-bit OS is better suited for me. But does the license allow me to do that?

[3] (The tricky part) - Since I have a good 320GB HDD, I want to dual-boot by creating two partitions - with a linux distribution (Ubuntu/openSuse) running on the second partition? Assuming I don't have the option of clean-install, will I be able to create the extra partition for linux using the Toshiba utility?

Thanks in advance.

Everything you need is here to Clean Reinstall - Factory OEM Windows 7.

Make your Recovery disks first and preserve the Recovery partitions so you have a path back to the preinstall if you want.

Look over these recommended steps to Dual Boot Ubuntu - EasyBCD - NeoSmart Technologies Wiki