Blurring the Lines
Here's my approach to establishing religion in the US. Start with blurring the lines between religion and government. Set precedents like putting God on the money and in patriotic pledges, then move on to claiming that God established our laws. Eventually, there would be so many precedents, that I would be able to effectively establish Judeo-Christianity as the de facto official religion. If I were persuasive enough, I might be able to repeal parts of the first amendment.
Funny thing is, this is the exact same way I'd try to prohibit the free exercise of religion as well.
I say, let them have the statue in the court. Keep blurring the lines until there is enough precedent to regulate religion. This is what pro-religion in government activists should fear.