Hi guys im a new member and have come to you with a problem :(

I played STW years ago and loved it, since i lost the game and here we are now i bought the game again on ebay and with a new laptop. I tried installing from disc and when ever i click "install game" from the sold out menu it just dosnt open anything. So what i tried to do was explore the disc and try running "ShogunW.exe" and it brings up 3 errors which i later tried to fix manually.

Cannot find "Weachatr.dll"
Cannot find "Wearsr.dll"
Cannot find "Weanewsr.dll"

So i copied all the disc contents to a temp folder on my desktop and downloaded the 3 missing DLLs into the same folder. Then "ShogunW.exe" does actually run, then brings up a new error "Please insert correct CD" when infact the original STW disc is still in the CD drive..

Im quite computer literate but this has got me stumped :( HELP?!!