While I don't know the exact product you bought - I doubt it is big enough. For a bunch of people around a table you'd need something at least 12 to 16 feet wide.
You see, you've GOT to have enough room behind the guys to avoid backsplash refelections from the background (Green, by the way, if you are shooting DV). That would be about 5 to seven feet of distance.
When you include the width of the table and this additional distance, you are going to need a formidable backdrop in place.
Next - yes, droopy and wrikled green screens are not "great", though workable. It doesn't have to be as tight as a drumskin - but if it was - you'd be happier in the edit suite.
Me?? Well, unless you are shooting this kind of stuff a lot (and I'm assuming it's a "one-off" - here's how I'd proceed.
1. (Easied) look around your area (within 50 miles, let's say, and see if there's a professional stage with a greenscreen setup. If so, put it into the budget, and go.
2. Find a high ceilinged room, big enough to hold your lights, camera and table. Paint the back wall green - GET APPROVALS ON THE FOOTAGE - and repaint back to white.
3. Buy a roll of green paper (Savage papers will work) - tape it to the back wall and shoot.

Ideally you would want at least three (or better 4) lights ON THE BACKGROUND. One on each side and one or two suspended over the middle of the screen. Then light the group with a soft side-light bounce. Maybe a backlit hairlight, as well to define the people.

This is NOT a "quickee" setup, and shouldn't be regarded as such, unless your client is willing to settle for minimal grade results. Once you factor in the cost of getting a bunch of execs (I assume) together, all at once, it does not make sense to skimp on production.

Hope this helps.
v.

I'd say as have others that you're going to need two stands, maybe a pole between so you can tension the fabric.
As to the size, can't be certain but from my limited experience you only need the green screen behind the bits that are moving assuming its a 100% static shot. This isn't ideal of course but you can create an addition mask in PS for the static parts of the shot. Like I say far from ideal but if you're on a tight budget maybe cheaper than a new screen.

Sorry it took so long to get back guys...I think I'm going to buy the 2-tripod stands with a 9 foot crossbar set up and buy a sheet of green to hang on it (since I'll only be using it on location shoots). I still don't understand why there is only one loop to hang it from but....anyway thanks very much for the replies guys!
Randy

Randy;
Do yourself a favour and order a piece of Digital Key Green Spandex (yes, spandex) from Rose Brand Fabrics in New York or L.A.
Product link is http://tinyurl.com/342a4
A cut piece (92" wide) is $42.50/yd. Have someone sew top and bottom sleeves to allow you to put pieces of PVC pipe in to hold it. Then use hardware store spring clamps (I got a set of 24 on sale a year ago for $10 Cdn.) to clamp the fabric to your tripod stands.
Rosebrand also carries something called Chroma Key Commando Cloth (118" width - $36.00/yd.) that looks interesting.
More info at http://tinyurl.com/298zz

Mike

If you're looking at stands, I would highly suggest that you get the most durable stand for your money. Bogen and Photoflex make some lightweight stands however they're really lightweight. You have to be careful how you position them or they're sometimes prone to tipping over. If you can afford the Arri lightstands, you won't regret it. Either that or a Matthews C-stand.

If you opt for the lightweight stands, you may want a couple of shotbags to hang from them to weight them down more.

my $.02

Mike

DON'T buy cheap stands. Avoid Giotto like the PLAGUE!! I've got a corner full of these crappy air stands that are junk copies of the better Manfrotto or/and Arri stands.
They SUCK, suck, suck.
Look to the Photoflex built in frame screen if you want a good one. Great stuff indeed.

Any good sites for a couple cheap c-stands ?

- Ray

www.undergroundplanet.com

Hey thanks for the replies guys. You know, maybe garage sales aren't so bad after all! My wife made me gather my trash for an upcoming garage sale and I ran across a couple of old (but very heavy duty) Ultimate brand speaker stands I had forgotten about. If I can modify it to hold a crossbar, I'm in bidness!
Randy
EDIT- I went to the local hardware store and bought a couple of 1.5 inch "T"s and a 10' PVC pipe and it works great...ugly as hell, but works great : )