Puder,
Good advice from everyone. Stainless T-nuts, staples, bolts/screws, finish washers etc. Talk to a local upholstery supply shop (distributor). There are different grades of vinyl and different manufacturers have different grain patterns. I know because I just went through all of this. Some manufacturers color will match your interior more closely but the grain will be off and vice-versa. There are different grades of foam also (density) and some boat builders wrap the foam in "saran-wrap" prior to covering. Take your time and it will come out fine.

Just a little horn-blowing for Formula. The only reason I recovered my engine hatch was due to sun damage on the vinyl. All of the wood and hardware was original from Thunderbird. Still had "311" and someone's initials written on the back of each piece of wood. I was impressed. Good luck.

For interior panels, I would use Starboard XL. It will never rot and you can staple with stainless staples. Visit www.kingstarboard.com for more info

The best foam is called Super-foam it is black or charcoal gray in color and holds its form very well. It will cost you a little more but it is worth it.

I'm a little leary of t-nuts so last time I did it I put screws through the backing before putting on the foam and vinyl. Then just use washers and nuts to hold them on. If you drill a smallish hole the screw will thread through the wood and stay nice and tight.