I think it works something like this:
If you load a PCG file, it loads the programs/combinations and during this step you can choose where you want to load the banks. If you choose 'all' it will load it into the banks as specified in the PCG (I don't know how to edit those). If you click the arrow next to 'all', you can select a specific bank from the PCG to load, and then next to it you can choose a target bank on your Kronos.
Once this step is done, the programs/combinations etc. are in the location where you loaded them and they will stay here even if you reboot your Kronos.
So now you have them in the desired location but if any program is using samples not from the default Kronos samples, they won't work until you also load the samples. These are loaded using the KSC file. You don't need to choose a specific location for samples, once you load them, the programs using the samples can use them.
So let's say you installed 4 EXs files on your Kronos, and you loaded each PCG into its own bank. If you add the KSC files for these EXs in the Global/Autoload KSC but don't mark it for autoload, then whenever you want to use any of the EXs programs, you simply go to autoload and select 'autoload now'. Unfortunately if you want to load it together with the preload.ksc (which is 1.6GB in RAM) it will take quite a long time to load it. Another option is to go to Disk Mode, then load the KSC file from there when you want to use it. There you can choose to 'append' it to the current loaded samples or to clear all the samples and then load it.
It's a bit of a PITA because the preload.ksc takes up 1.6GB RAM of the 1.9GB available. (in my case, I have a Kronos SE with 3GB ram, 1GB is for the OS, 1.9GB left for samples). So that leaves around 300MB for EXs. Using autoload you can autoload the samples for one or two banks if you use them a lot.
Another route is this:
After booting the Kronos, go to Disk mode and select the PCG, then select 'Load the xxxx.KSC too'. Then click 'all' to change it to the bank that you want to load and select a target bank. In my case, this usually means cancel, open the PCG, open Programs then look which bank it is using, then up, up, then load, then select that bank and select a target bank, select the 'load xxxx.ksc too'. Set it to 'append' for the samples if there is enough memory. If not you have to choose 'clear all'. Then load it and play.
If you don't use these EXs banks simultaneously you can opt to always load them into a specific bank that you always use for loading an EXs. Say you use User-GG for this, you just select your PCG file, load it into User-GG and play. If you want to load another PCG file, you load that one into User-GG. Then you use the other banks to save your own creations.
edit: above is how I think it works so I could be wrong about a lot of stuff since I am still new to Kronos...
Some questions I still have to figure out:
If a PCG contains both programs and combinations, do you have to load it twice if you want to choose where to load the programs and where to load the combinations?
If a PCG contains drum kits how can you choose where it loads those?
If a PCG contains wave sequences, where do those go when loading?
How can I edit the banks specified in a PCG file so I can set them to the bank I want and don't have to do this manually every time I want to load it? I have PCG Tools but I cannot figure out how to edit the banks.
Is there a way to visualize which programs/combinations are not loaded?
Is there a way to auto remove the programs loaded from PCG files when rebooting? My banks are filled with different EXs programs but don't work until I load the KSC that belongs to it. Well they work partially a lot of times when they use default instruments/samples from the Kronos so it becomes quite a confusing mess pretty soon.
By the way, did anyone notice the screenshot of the PCG loading on page 841? Interestingly, it shows 2.3GB available memory. How is that possible? I thought 1.9GB is the max, but maybe it can somehow be increased?
Anyway, quite an adventure figuring out the workings of a Kronos.
