Hi revans,
Your reference to service pack three just indicates that the asset you are asking about was created as trainz-build 2.3, and this means that it should work just fine in TRS2006, which is either 2.5 or 2.6 depending on whether or not you installed SP1.
Unfortunately, the asset appears to be broken, with errors in both the building (industry) and the product files. I just downloaded it and it won't work for me either. You might try emailing the author, or perhaps someone here will know how to fix it.