First of all, DON'T DO IT! Don't Refinance! Your house is not an ATM.
Secondly, your going to get hosed. Because the appraiser will jack up the price on the estimate as high as he can so you can suck out all the money you can and think your getting a good deal. your not.
Thirdly, once the refi is done, you get wonderful pleasure of paying a higher property tax rate for the falsely inflated price of your home. Which the government will happily take away from you if you fail to meet this obligation cause you failed to include it in your budget for payments.
Fourthly, your actions have now caused the others in your neighborhood to have higher tax rates or re-assessments on their properties and will now be paying more because of your actions. I think they will be really happy to meet you.
Other than this, just clean up your messes and make it accessible to the floor and closets and such so he can run a tape for size. Make sure its' clean and well painted for the pic that the banker see's so he will give you lots of money for the property.
Have fun and make sure you smile when the mortgage bill comes round in couple of months.