Ok, forget about it.
Our Infrastructure Department managed to do so with IIS.
Create a project in IIS as you want ..
Run EPM configurator by selecting Logical address under Foundation, and give same porjects name.
This will create entry mod_wl*.conf for redirection.
But you have give resource name in link to access planning, So new link to access Planning will be like http://budget.company.com/HyperionPlanning/
Hope this help!.