Installation Error

When installing SmartFTP, the installation stalls on the screen which says "computing space requirements" I have tried rebooting, and trying again, but get the same error.
So, I tried going into the smartftp setup files folder, and opening the Smart FTP Windows Installer Package, and now I'm getting the error, "This installation package is not supported by this processor type, please contact your product vendor" I have a very common processor, so this seems strange. Please help.

My computer info:
Intel Celeron 2.2 Ghz
Windows XP Pro, version 2002
service pack 2

Use the latest build from my footer (this setup uses NSI instead of MSI).