can 2 excel instances act independently?

hi,

wbMAIN is workbook in 1st xl instance and wbOTHER is workbook in 2nd xl instance
wbMAIN as primary platform is for my working/inputing data etc.
the goal is to use wbOTHER in the background (hidden) to process some data (read text, process and serve)
problem is that when i run macro in wbOTHER, my wbMAIN cannot be used (it hangs) untill the macro in wbOTHER is completed.

this is what i have in wbMAIN normal module

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in wbOTHER normal module

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in wbOTHER thisworkbook module

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is it possible to achieve such?
any input/advice is appreciated.

Hi Leith Ross,
i did what you suggested, but to no success. wbmain still hang until code in wbother completed.
there is a diffrent though. when i open the wbother MANUALLY (not by macro in wbmain) i can work with its sheet (select a cell, write values to it, etc). this would get me halfway if wbmain is the one that can be worked with.

anyway, hours of trial & error, i ended up using:

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which works fine.

note: opening with shell, but without placing the DoEvents in wbother, wbmain will hang..so i thank you for your suggestion