It sounds like you need to add a number of 3rdparty packages to the kbmMW runtime package. Usually Delphi comes with suggestions for those, which you have to accept and let it recompile.
Ive checked kbmMW package, and by itself it does not contain more than roughly 11.000-12.000 exports in the export table. Hence the others must come from referenced 3rdparty libraries being compiled into the kbmMW package itself.
You dont have to modify kbmMWConfig.inc every time, just add the DCP runtime packages of ReportBuilder as a reference in the runtime packages of kbMMW,recompile and that will do the magic, doing that before compiling kbmmw pàckages will prevent the compiler to include the units of RB to the kbmMWPackages. It will only add a binding to the RB DCP runtime packages.