XnView Software

I use XnView in Portable mode > All settings in XnView directory.
My first question is:
Is it possible to use 2 different XnView.db for thumbnails?
( For example - 1 configuration with small thumbnails +1 with big and both to keep cache in default XnView folder - something like XnView-1.db and XnView-2.db I want to use "XnView" as location, not "custom" path for each)
Second question is:
Is it possible to cache specific folders only?
(For example "Google Picasa" has check marks to include/exclude folders for caching.)
Is it possible to obtain similar behavior in XnView ?

no sorry

Playing with paths I made a "discovery"
Relative paths can be used.
If I choose "Custom" location for cached thumbnails and type ./Cashe-1
data will be inside of subfolder of the default "cache" folder.
And portable mode will be preserved.

If somebody want's to run different ini configurations this is a solution for cached thumbnails.