I haven't been able to find a specgrey file. It is missing from all of the SPORBUST assets I have looked at.
IMO, all of this is Auran's fault. They should have spent a little more time on new versions of Trainz so as not to break so much older content. With the huge store of content already out there for TS2004, creating new products (TS2006-2010) should have at least included a conversion utility that would convert old content to the new format. By doing what Auran has been so notoriously doing, breaking old content, they are already slipping the noose onto their neck. I get so frustrated with Trainz and all of the broken but good content that I go over to the RailWorks web site and contemplate purchasing their latest product. I don't really believe that would solve anything, but such emotion precludes reason.
I feel for all of the content creators who have spent countless hours creating great content, and uploading it so that the rest of us can use it for free, to have Auran come along with a new product that has a lot of advantages over the old, but will not support the old content.
I have never seen this in any other software. I can still open a Word document created in Word 2000 on Word 2010. I can still open any jpg file created in Photoshop or any other jpg software, and I can open any MP3 file in any software that is designed to open mp3. Age does not matter.
I'm not giving up. After having seen the quality of the SPORBUST assets, I am motivated to get all of them working in TS2010.
But I may be giving up on Trainz. 2010 was my last purchase, and I am not planning to purchase the new multi-player game or any future games from Auran until they clean up their act.
Perhaps I need to re-install TS2004, and work with the old content there before trying to import it to TS2010. I don't actually have the program discs for TS2004 anymore, but since I still have a valid serial number, I should be able to download a copy and plug in my s/n.
FW