The x86 MSI is stored as a delta of the x64 file. To extract the x86 MSI, call:
Octodiff.exe patch PDFCreator-Professional-4_1_0_26043-Setup_x64.msi PDFCreator-Professional-4_1_0_26043-Setup_x86.msi.delta PDFCreator-Professional-4_1_0_26043-Setup_x86.msi
