Cameyo

Please see this guide on best practices. http://www.cameyo.com/resources/Packaging%20Best%20Practice.pdf
Also, in your case, I would recommend packaging with a clean xp machine. Make sure you turn off anything unnecessary that will write to a file or registry. This is what I normally do.

1. Create a clean virtual machine and install the OS.
2. Take a snapshot of the virtual machine so you can restore it later if you need to.
3. Run Cameyo.exe -StartCapture and wait for the success message.
4. Wait for a set amount of time. I usually give it an hour. During this time, keep the virtual machine running, but do not use it at all. We are going to use this time to make sure unnecessary files and registry entries are not being picked up.
5. Run Cameyo.exe -EndCapture and wait for the message saying it cannot autodetect or w/e. Ignore it and build it anyways. Edit the package and confirm there are no file and registry entries. If you don't need to turn off any unnecessary programs or services, you should either have an empty package or receive an APIRET error. I have no idea why I get APIRET error or even if that tells you the package is empty but those are the results I get. If you find unnecessary files and registry entries being picked up, google the file/registry key and see what write it and disable that program.
6. Once you have confirmed no unnecessary files and registry entries are being picked up, reboot the computer and repeat steps 3-5. We want to be sure we aren't picking up extra files and registry keys. If we are good, continue to the next step, otherwise, repeat steps 3-5 until you are.
7. Reboot your computer one more time. You are now ready to package your application. I would also use the -StartCapture and -EndCapture as you can redo the end capture using this method if you mess up. Optionally you could always rely on snapshots to backup the pre and post captures.