you can also try this:
http://www.google.comenter \"file joiner\" as the search
the first hit i got was:
http://www.peretek.com/sfj.php*** WARNING *** i haven\'t tested to see if the program will actually work for planshift file coz i can\'t be bothered at the moment... by the looks of it though it should...
it\'s a file joining program (surprise surprise)
it\'s a windows program (ie GUI)
after installing, run the program
click add and select all the part files for planeshift
make sure they\'re in the right order (ie 1 at the top, 5 at the bottom)
then click join button
then type in something like:
Planeshift Installer.exe
(this is the file it will join it as)
then press ok and it\'ll join the files
i am hopin this method is idiot proof
however if it says the installer is corrupt or some junk then one of the parts i corrupt and you gotta get it again