It is not possible to make this happen. Short of a fraudulent appraisal, and then that fraudulent appraisal getting past underwriters and appraisal review folks, it is impossible ... UNLESS you have the cash to pay down the loan balance to the realistically appraised amount.
Please note ... inflated appraisals and shady purchases and refis are a BIG reason we are in the mess we are in. Thus, safeguards are now in-place to avoid this in the future, and I hope these safeguards are forever in-place to protect all of us.
I feel your pain, as I have an investment property worth more than I owe, and an adjustable loan on it to-boot, so I am surely not poking fun at you. As the old wives tale goes ... one can't get blood from a turnip.