I posted this in a similar thread, but I thought it might be best if I posted it in both places:

This is what I get when I open the package contents and run the installer script (Contents/MacOS/install) using the Terminal. I hope this helps in rectifying the problem.

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InstallAnywhere 4.5.1 Enterprise
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Sat Feb 02 15:44:38 PST 2002

Free memory = 1309 kB
Total memory = 1984 kB

No arguments.

java.class.path:
Contents/Resources/Java
/Users/simmy/Desktop/install.app/Contents/Resources/Java/Installer.zip
/Users/simmy/Desktop/install.app/Contents/Resources/Java/IAClasses.zip
/Users/simmy/Desktop/install.app/Contents/Resources/Java/installscript.zip

ZGUtil.CLASS_PATH:
/Users/simmy/Desktop/install.app/Contents/Resources/Java/Installer.zip
/Users/simmy/Desktop/install.app/Contents/Resources/Java/IAClasses.zip
/Users/simmy/Desktop/install.app/Contents/Resources/Java/installscript.zip

sun.boot.class.path:
/System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Classes/classes.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Classes/ui.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Classes/i18n.jar
/System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Classes/sunrsasign.jar

java.ext.dirs:
/Users/simmy/Library/Java/Extensions
/Library/Java/Extensions
/Network/Library/Java/Extensions
/System/Library/Java/Extensions
/System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Home/lib/ext

java.version == 1.3.1 (Java 2+)
mrj.version == 3.1
java.vendor == Apple Computer, Inc.
java.vendor.url == http://apple.com/
java.home == /System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Home
java.class.version == 47.0
java.compiler == null
os.name == Mac OS X
os.arch == ppc
os.version == 10.1.2
path.separator == :
file.separator == /
file.encoding == MacRoman
user.name == simmy
user.home == /Users/simmy
user.dir == /Users/simmy/Desktop
user.language == en
user.region == US
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InstallerModeController: No lock file present.
Extractor Directory Not Found, using 'user.dir'
Default properties location = /Users/simmy/Desktop/
UI Mode set to Default - SWING.
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Installer: InstallAnywhere 4.5.1 Enterprise Build 1350
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Installer: no 'sea_loc' in working dir, couldn't define $EXTRACTOR_EXECUTABLE$

Any suggestions?