Do not use the foam backed Cobra carpet unless you want to go through this process again in a few years. The factory carpet has a foam layer between the fabric and the adhesive that dries out rapidly in anything less than the green, high humidity environment in Europe. In the western US, it starts to separate and fall apart within a year or two.
Use a decent short pile outdoor carpet with a rubber backing and a construction adhesive like Liquid Nails or DAP Beats The Nail to glue it on. Work the adhesive into the textured rubber carpet backing and press immediately into place. More glue is better. The stuff is cheap. A $2.00 tube should be enough for everything.
Carpet: Look up Daystar Marine carpet from Gander Mountain. I use it on the wing wheels I build and it holds up well.
http://www.gandermountain.com/modper...ls.cgi?i=71847