I too have a problem in isntalling WC4 on Vista and i hope its okay that i write it in here, for i didnt want to open a new thread for this...
Anyway.. i searched in here for a solution and looked into the tech support, but the only thing suggested there is to try different compatibility modes, I did that but nothing worked.
I get the message "The Programme does not work on 64-Bit"etc.
I come from germany so i cannot post the "error" properly
Then I tried it with Dosbox but well.. i was not really able to use the CD-Rom via dosbox...
Can you help me out here?