Budget Setup for indoor shots?

[woodcycl]

I'm a very 'amateur' photographer wanna-be. I have the D80 w/ 18-200 lense and a bit of know-how. Photography is just a enthusiast hobby. However, I am being asked to take indoor and outdoor photos for a business I do IT/Computer and web design and hosting for for their webiste I'll be building.

At a minimum, what additional equipment can I feasibly obtain for a few hundred dollars to help ensure the lighting is good for, especially, the indoor shots? Lights, stands, external flash, etc.? Again, this would be on a budget ... the only "occasional" use type of equipment.

I've had the SB-600 on my wish list now for about a year, but haven't purchased it yet. That will set me back >$300 so I won't have much left to get a few lights, stands, etc.

If anyone can point me in the right direction that would be greatly appreciated.

Thanks much!

[Rentham]

If money is a major factor, you could probably get an entire manual flash set up for what it would cost you for the Nikon unit.

Strobist® Starving 1 Light Kit MPEX