Could you give me more specifics?
Sure. Lets say just for an example that you want to do a winter route, and you want to select a bunch of buildings, trees, track and ground textures appropriate for a winter scene. Open up CMP and select the item you wish to include on your list. Right click on it and select "Edit keywords" from the menu. In the menu that will now appear select "Add".
Add a keyword such as "winterroute"...it has to be one word. If you want to add several keywords, place them with , or ; between them with no spaces, such as: "winterroute,snow,winter". Now click OK and exit the menus. Pick the rest of your items.
Now you should use the BACK UP KEYWORDS command from CMP's file menu, so that if CMP or Trainz crashes you will be able to reimport your keywords into the game. This might take a few minutes, so wait for the screen to pop up telling you it has been done.
Now when you open Surveyor and you want to look for your keyword stuff, go to the menu bar at the top of the screen and look for the content search filter icon on the left. Click on it and type in your keyword, in this case "winterroute". What will now show up in the selection menus for Paint, Objects, Tracks and Trains is only the stuff with the correct keyword. You can save the search filter keyword so that you don't have to type it in each time, just as you can save an author's trainz user name, in my case "gfisher".
This is a very useful little utility and I use it all the time.