Is it possible to use one entire preset for interiors and one for exteriors?

For example:
Kinematic ENB for interiors
Bleak ENB for exteriors

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i5-6600k -- Nvidia GTX 970 -- 16Gb ram @3200mhz

If they use interior and exterior separation code in the shader files - yes, if not then no.

And to do extra work to combine code in shaders, switching in based on interior/exterior basis. Btw, the simplest way to make this is by drawing screen quads by two shader functions and in vertex shader turn each quad visibility individually, depending from int/ext. Still, it's some work to concatenate global variables, if their names are same for both presets, it's increasing complexity a bit, but still simple.

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i5-4690k, 16Gb RAM, GTX 1060 6Gb, X-Fi Titanium, Win7 x128
I am INFP, not the brutal, godamnit.

There is currently an 'enbseries' folder, that all files other than the enblocal.ini and enbseries.ini can go into, correct? Couldn't you make two enbseries folders"

enbseries1
enbseries2

The first will handle the exterior files. The second will hand the interior files. The only problem would be the enbseries.ini file and certain parts like [COLORCORRECTION].

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i5-6600k -- Nvidia GTX 970 -- 16Gb ram @3200mhz

Sorry, i do not modify anything, which only increase complexity with doubtfully result.

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i5-4690k, 16Gb RAM, GTX 1060 6Gb, X-Fi Titanium, Win7 x128
I am INFP, not the brutal, godamnit.