Can I load in and use both Office 2007 and microsoft office 2003

[aob]

Using XP

I have to train a relatively inexperienced person. I am familiar with Word 2003, having used it for many years. I cannot do the training, long-distance, if she is using Word 2007.

Can I have both Office 2007 and Office 2003 loaded in, giving her the option of using either Word 2007 or Word 2003?