Exchange domain for physic. Hosting?

[mranon]

Hi,

I'd like to exchange the domain of one of my physically hostings (a project got a new name and domain), but I cannot find any solution for it. Domain-Aliases doens't work properly, because subdomains aren't working (sdomain.old-domain.com works, sdomain.domain-alias.com refers to the default plesk-page), email-usernames aren't working with the new domain, etc.
The only solution I thought about was to set up a new physic. hosting and moving all the data, but that's hard work. Is there any possibility to edit some files, rename some dirs and then the new domain will work?
It would be wunderful if anyone of you is smarter then me and can tell me a good and easy solution....

thanks guys and girls...

 

[breun]

Can't you just change the name of the domain? Domain > Domain Administrator > Domain name.