It doesn't matter about the spaces. What you need to do is unzip all of the files then delete all of the zip folders.
Download the batch file renamer from here.
CLICKWhen you open the renamer, first point it to the directory with all your unzipped files in.
Next click on the extensions tab.
Select change all extensions to and type a26 into the box next to it.
Click start at the bottom and it will rename all file extensions to .a26, takes about 10 seconds.