Remove & Reinstall NIS2003 - Subscription date problems

[yellorose]

I am trying to uninstall and reinstall NIS2003 on a new PC that was originally installed from a Zen image. The image already had the trial of NIS installed when it was loaded to the PC, this has caused the trial version to expire in a few days. I need to get this trial version reloaded without having to reinstall the PC manually, since the PC was bought today I would like the whole trial time available.
I have tried the add/remove programs, followed by manual uninstall, including editing registry, deleting temp files and shared folders. Nothing has worked, I continue to get the same expiration date after reinstalling the program.
Ideas or further instructions greatly appreciated.