This mod looks good, but I had an error message

[Uesugi Kenshin]

Chill, you installed it incorrectly in some way. If you tell us exactly what you did to install it, or make a second attempt to install it and then tell us exactly how you installed it (in case you forget what you did this time) someone will be able to help you. The mod does work, and many people have successfully installed and played it. I am in Germany on an exchange trip for the year, and my family has pay by minute internet and I have none of the relevant files with me so I will not be able to help you, but I am sure someone will.

[Wladyslaw IV]

I don't believe this needs a seperate copy of RTW as it doesn't override anything. That could be the problem. It was with Chiv.

[Uesugi Kenshin]

I'm not going to slap you with warning points for cursing once, but you should edit your post and remember that this board does not tolerate swearing.

This mod does require a second RTW install and does override things, but again I can't get too specific because I am in Germany and don't have the files because I don't even have RTW at the moment.