These are the tutorials I posted earlier:http://www.cybereye-visioneering.com/csx/Making_Domes.pdfhttp://www.cybereye-visioneering.com/csx/Size_Does_Matter.pdfhttp://www.cybereye-visioneering.com/csx/Making_a_Torus.pdfhttp://www.cybereye-visioneering.com/csx/More_Domes.pdfhttp://www.cybereye-visioneering.com/csx/Complex_Arches.pdfhttp://www.cybereye-visioneering.com/csx/Making_Arches.pdfhttp://www.cybereye-visioneering.com/csx/Making_Spirals.pdfI found the tutorials here:http://www.garagegames.com/community/forums/58It's very likely you'll find lots of more useful information there, so be sure to browse it.