Getting a Focusrite Scarlett to work as an ASIO device inside SONAR X2 Producer (FIXED)

Now it might seem a little odd to be posting about a problem I've already solved here, but I thought it might come in handy for someone else one day.
 
I'd been having a problem where for some inexplicable reason, my Focusrite Scarlett 18i6 would only function with the driver type set to WDM. Whilst it would work for the most part, it could be temperamental, with the occasional drop-out of the SONAR Audio Engine, and it repeatedly losing a connection between the PC and the interface itself. Any attempt to select ASIO lead to me being unable to select the Scarlett inside SONAR, though it appeared to show them as an option - so for the last couple of weeks, I just lived with it under WDM.
 
This morning, it looks as if I finally got to the bottom of the problem. This is what I posted on the SoundOnSound Forum earlier today...
 

Well after all that, I think I worked out what the problem was, but only as a kind of accidentally noticing something odd about the amount of RAM Win8 was reporting, as I was gathering together some facts and figures for explaining what I was seeing in more detail.

The PC itself, though quite old (ASUS P5W DH Deluxe / Intel Core2 Quad 2.4Ghz) now, seemed to have been handing itself quite well since I installed Win8 on it. As I was checking a few details though, I noticed that it was reporting only 3Gb of available RAM, rather than the 8Gb it's had fitted since who knows when exactly. Previously, it's seen 2 different 64-bit Win7 incarnations, one of which was also as a DAW. A little research prompted me to go looking in the BIOS for a setting on 'Memory Remapping' - sure enough, it was disabled and effectively set to 32-bit mode, hence the memory limitation.

With that reset, SONAR was more than happy to switch over to ASIO (for the Scarlett) and map all the necessary I/O, which it would not do with that interface before.

The only downside I've discovered in doing this so far, is that the Scarlett does not sit comfortably with my Line6 POD X3 Pro, which also uses an ASIO driver when connected by USB. Whilst I don't use that as a recording interface, it does mean I can't change settings on it via Gearbox, as I've had to disable it in the Win8 'Device Manager'. That's more of an irritant than anything though.

Never in a million years would I have guessed that a BIOS setting would have been doing something like that...

 
I hope it's of use to someone.