If your only requirement is that your script is converted to a portable exe, will perl2exe suffice for what you need to do?
yes, you'd have to (or should) pay for it if you use it and that sucks a bit - but it might just save your skin if your client has a maintainance agreement on this app with you...
Update:
When you run the PAR::Packer test suite, are all the tests passing? If not, which fail?
Comment on Re: Desperately Seeking PAR::Packer for Windows XP
Thanks for your help. As you can see above I think I'm fine. PAR::Packer, for your information, would have errors like "perl_hv_common_key_len could not be located" and other things like looking for a "perl5.10.dll" even when using 5.8 versions, so, something of a nightmare...