Hi JmasterJ, Welcome to TechIMO! I have bad news for you.
In a raid 5 array the parity information of the array is spread over all the hard disks (no parity disk exists as in Raid 4).
The loss of one disk from the array wasnt a too bad, but losing 2 disks of a 3 disk array is killer. For any real chance of full data recovery you MUST have more than half of the data/parity info. IF you have not sent the second disk off, Keep it, and attempt to recover the array using the hardware and software combo used to create/keep the array. Recover all your data to a SEPARATE disk/drive! With 2/3 of your data missing, you can kiss any real chance of data recovery bye-bye unless your willing to send your array to a professional service.
Do not spend $800 on this software as it will tell you that it needs some of the info on the missing drives.
As a side note: Using a Raid array doesnt stop the need for good high quality backups! Preferably multiple backups with off-site backups also.
Anything worth a raid 5 array deserves full weekly backups with incremental daily backups preferably Off-site. For the cost of an external drive(or even just a CD-DVD writer/disks if your critical data were small enough), as little as $150, you could have extra copies of your data, and would not be hurting rigt now.