tuning config with blastParametersScript

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Dear Dr. Hickey,

I am using Progressive Cactus to align mosquito genomes. Mosquito genomes are highly heterozygous with levels of divergence of >1% between chromosomes in the same individual. Most of my runs with ProgCactus seem comparable to TBA, but I was curious as to whether a tuning of the config file may allow for longer alignments in some regions. The issues section on your github site mentions the python script blastParametersScript.py, but I was still unclear on how this relates to the config file settings.

Thank you for your time and support of a great program!