You may do it , however be aware that the exe released with this overhaul is not finished and the installer isn't done... so if you are using this project you are better off waiting until it is actually done...
If you mean the original menu reconstruction for use with Avalanche and the old graphics, sure, you are cool to use that also.
Just link to this thread and make sure to credit myself and Kranmer.
The problem is that the installer we do release will be pretty full and detailed, and it is much better and wiser to simply use our installer with your own rather than incorporate all the patches individually.