TOPIC:

Actually it didnt help. I could find the baseset directory in the folder. Might just be thats abit lost, but still cant get it working.

well, I guess it's better start with a very clean OpenTTD folder, follow this steps:
- download the stable ZIP file from openttd website ;
- Create a new folder, anywhere, called "OpenTTD BTPro client", for example;
- extract the zip file downloaded above to the created folder;
- download the BTPro client here ;
- extract the files on BTPro zip file to the "OpenTTD BTPro client" folder, replacing the existent ones;
- create an empty txt file on the above mentioned folder, and rename it to "openttd.cfg" - or download this one ;
- execute "openttd.exe" - will ask you to download the gfx files... make it;

It always works