All you have to do is go to browserforthebetter.com and download IE8. Microsoft will then donate either 41.15 or $2.30 per user until the limit of $1 million dollars are reached.
Tip : I personally like IE8 lot better than IE7, Even if you don’t plan to install you can just download to feed the hungry.
Here are the details from website –
Only complete downloads of Windows® Internet Explorer® 8 through browserforthebetter.com from June 8, 2009 through September 30, 2009 qualify for the charitable donation to Feeding America®. Microsoft® is donating at least $1.15 per download, with a maximum of $2.30 per download by users of Windows® Internet Explorer® 6 after August 24, 2009, to Feeding America® up to a maximum of $1,000,000. Meals are used for illustrative purposes only. Meal conversion is effective until June 30th, 2010.