I am sorry for the delay – but we did not get this message. Please use our support system if you wish our assistance – this is a general interest forum where clients can share their custom solutions if they wish to.
Unfortunately we cannot do much for overwriting the CSS of IDXpress plugin and also we cannot change the IDX advanced search functionality.
For future update we plan to make some design changes but we are not sure if we can do much. We are not sure if this will work until we do the work.
Please open a new ticket on http://support.wpestate.org/ and we will update when we have the chance to work on this.