![Wink ;-)](./images/smilies/icon_wink.gif)
Before you install the 1.06 patch, create a new folder on your hard drive somewhere outside of the Railroad Tycoon 3 folder and name it something like RT3 106.
Copy the entire contents of the Railroad Tycoon 3 folder into the new RT3 106 folder. Then patch that to 1.06.
For Trainmaster, do the same thing. Copy the 1.05 contents into a new folder named something like RT3 TM. Then install TM into that.
Once you have the two new installs done, open the main folders for each of them and right click on the RT3.exe and send it to desktop (create shortcut) for both of them (the 1.05 install should have already placed an icon on your desktop).
I hope I explained this in an understandable manor.
![Mr. Green :mrgreen:](./images/smilies/icon_mrgreen.gif)
Some of the maps created for 1.05 work better in the 1.05 install than they do in the 1.06 install, and Trainmaster definitely needs it's own installation.