When you import content with trainz-build numbers above 2.6 into TRS-2006 you are actually installing and backdating these assets to work in 2006. As stated earlier the first step is to get the end product CDP (railcar, loco, etc.) and any missing dependencies onto your computer so it/they can be installed into 2006. Where the DLS is involved, I FTP these one by one from the DLS to my PC and then install them into the 2006 CMP. If you have problems beyond this point I have a Word document covering all the issues I've had with backdating these assets to work in 2006 once you get them into 2006. Send me an email via the forums if you would like a copy of that and I'll attach it to an email reply. It is too long to post here in the forums.