How to install windows 7 before finishing the installation of windows xp?
 

I format my laptop work for sunlife Microsoft Office Standard 2007 Keygen tomorrow and need my laptop to run Windows 7 Serial for their software. Currently i have Office 2010 Standard installed. I want to know if I can split my hard drive and when computer boots I can choose xp or Microsoft Office Home And Student. So I can use xp for work and windows 7 for home. Since i don't have the cd for Windows 7 Ultimate Activation I don't want to remove it completely. Any suggestions and help would be appreciated!