Your question is off topic here: it's more appropriate for the Office Answers Forum at the following address
http://answers.microsoft.com/en-us/office
Anyway, go to the following address
http://office.microsoft.com/en-us/try/
and download the Office 2010 Trial version: when performing the setup, choose to install only the software programs you want to install.
Besides that, I suggest you to install the Office 2010 in a virtual machine environment to be sure you'll not compromise your Office 2007 installation.
Bye.
Luigi Bruno - Microsoft Community Contributor 2011 Award