If you are currently running version 1.5 on your system the upgrade is simple
all you need to do is switch to the \\rdcasino dir then erase the file 
casino.ply then copy the exe files in this archive over the existing ones.

If you are running an older version of rdcasino. you will need to re-install
to do this change to your rdcasino directory and run cinstall then choose I
to un-install the game files. After doing this you can run install to install 
this version.

If you simply copy these files over your existing ones you will have major
problems and will have to reinstall anyway.

if you want to remove the old rdcasino manually then you need to remove the 
lines from 3rdparty.dat in the main lord directory that read
    Call rdcasino.bat info.*
    `$$ `9Casino `$$
The other files can be over written without harm to the game.

after these lines are removed you can run install.bat or rdsysop.exe to get
you up and running, If you are a registered user you will need to renter your
codes in the reg area, First install the game then switch to rdcasino dir and  
type rdsysop then enter your codes using the option provided.