You could have a look at the Help Pages
here. The 6001 error code may refer to a known problem with your InstallShield being corrupted (I'm not being cheeky, but you don't have Kazaa on your system, perchance?).
Here's something to try:
1) Create a System Restore Point (Start - Accessories - System Tools - System Restore).
2) Assuming that Windows is installed on your C: drive, navigate to C:\Program Files\Common Files\InstallShield\Professional\RunTime and find the 0701 folder. Delete it.
3) Reboot and try re-installing the game.
4) If that fails
re-name but do NOT delete the Installshield folder (to Installshield_old or something similar), and try again.
Usual rules apply - before you do anything at all with anything except programmes you have installed yourself, create a Restore Point.
Let us kow how you get on,
reikidave