i did all the manual heavy lifting,you just  need to open the xml  look at the directory name (ROM name) and delete what's not on the list cause it is non working.
saved me around 
100GB  
 the full set (excluding the 6 laser discs games ) of working chds on the 0.150 version is around 44GB.
the laser discs games are around 66GB.
still with both combined you save over 90GB of non working games!
it's on the other pc i would send it to you later today.
atm watching aliens special edition Blu ray  

edit: the list is for the 0.150 version and not the 0.148/0.149 versions,just a heads up since each version make some games behave different,some are fixed some get broken,so the list is a reference for 0.150.