It has been discussed many times. Over and over again
You use a very modified rom - contact creators for all the problems.
Even with standard new releases of Android it is possible to have problems, so:
Install the program from the internal memory. What's the problem with that? The whole software package can barely have 50MB. And transfer - redirect all of the big content to mSD card (maps, pois, dem...). Also explained many times and here nicely by Texas.
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