[Samsung Gear VR] CRE:
The simplest solution for accommodating a larger PD would be angling the lenses (mere single digit degrees) to allow for the natural convergence to occur without decentration. To visualize it simply, think of the lens' center as a tube... When you move the lens out, but the image remains in it's location, you're looking at the sides of the tube. Pivot the lens and you're back in business. Naturally, this will cause a stretch of the image at the periphery but it shouldn't really be notable to anyone with less than superhuman vision (or folks with a 90mm PD... Have yet to see that in person). This could be corrected for with a fraction of prism added to each lens but isn't worth the effort in all but the most extreme cases. This would allow for the use of any software regardless of the software's adjust-ability or lack there of.

EDIT:

I forgot to mention that when implementing this method you would naturally place the lenses with a DBOC less than your PD but greater than the 61-62mm or the devices image center to center distance. So, you'd be doing something along the lines of: you have a 70mm PD and an Image Center to Center 60mm; ((70 - 60)/2) + 60 = 65mm DBOC [Distance Between Optical Center of the lenses]. This is just a gross example... I haven't done the math and the angle will vary depending on how distant the source screen is from both lens and eye. The actual equation will involve a geometric solution but this is a start.

Taking things further:

For those dealing with a mere sphere correction (myopia or hyperopia) you have a couple options for correction. Take the difference between each eye (generally labelled as OD for the right eye and OS for the left on your Rx). So, for example, we'll say my right is -1.50F and my left is -2.50F. The difference is 1 diopter. You can get an Rx for a -1.00F contact lens for just your left eye (the focal mechanism in the Gear VR will adjust for the remaining -1.50F in both eyes). Or you can stack on a -1.00F lens from a trial frame (a 35mm trial frame lens is the perfect size for this); OR you can calculate the difference in focal distance (approx .8mm per -.50F from some very gruesome and quick measurements and calculations) and move whichever lens requires it back the necessary distance. If you stick with dealing with the lesser side you'll always be moving one lens back and never having to move one forward. If the difference in your prescription is extreme and balance an issue (when stacking a trial lens on makes thickness an issue and your eyelashes may brush the lenses) you would take that difference and split it in half and put +.50F on the OD and -.50F on the OS, granting a total effective correction of -1.00F and the Gear VR does the rest.

I'm not going to post all the math right now, but from some crude calculations (and a couple guesses at distances between screen and lens) I believe that you would move a given lens back approx 1mm to achieve -1F. So if you want to lower the correction in on eye by one diopter you move the lens back with a spacer 1.6mm (remember, we only want to deal with lowering as to increase you'd have to modify the housing to put the lens further forward).

For Cyl corrections I'm afraid we're stuck with contacts, trial lenses or waiting for prescription Gear VR lenses.

Academic...

Has anyone here access to a lensometer which can read these lenses? I've come up with 34.5F Ended up adding a -20.00F lens to knock it down into a range I could read.

F(power in diopters) = 1(meter)/d(focal distance in meters). It's easy to get a bit confused with the math (I did and I've left all my notes at work so I'm going from memory right now) as the distance between lens and device changes as you adjust focus (for me with the lower correction eye dialed in) I would only need to physically bring the other lense .8mm for a -1.00F change). Also if you over think it you may confuse yourself as to whether you need to cut a measurement in half or use the full value (generally you'll notice once you try it if it's off... ;) )

P.S. I've somehow manged to scuff one of my lenses in all of this. It's not perceptible but knowing it is killing me!