Promoting Carson City's historic assets - and keeping them intact - is going to be crucial as the city continues to grow, and the freeway and V&T tourist rail are completed.A nonprofit organization that would help fund restoration of historic buildings around the city could become a reality later this year.The organization, still unnamed, could create an executive board as soon as next month and a citizens advisory committee possibly midsummer.One of the organization's first orders of business will be to aid in the preservation of the First Presbyterian Church.This and all the other historic buildings are "part of what …