Project 2007 Import problem

Project 2007 Standard

I would have searched, but the search engine is still down.

Have a combined Proj 2007 schedule with a Proj 2003 part that is corrupt.

I have copied the data to a csv spreadsheet and chopped out non-essential data to make a copy/paste back into the main project.

I have overcome all of the formatting issues, but I cannot paste into blank tasks.

The old 2003 part of my schedule had hidden columns or something that were corrupting the entire schedule.

How can I import the 300 tasks back in without utilizing the old 2003 inclusion?

Thanks!

Victor