Settings for dslr project?

I have a nikon d5000
i have the following lenses:
nikkor dx af-s 18-55mm f3.5-5.6g
nikkor dx af-s 55-200mm f4-5.6g
nikkor dx af-s 35mm 1.8g

i have a basic jessops own flash gun with diffuser and a tripod

someone has asked me to take some photo's of his flutes to sell - he wants them to be nice /arty but i think he's looking to sell them etc.

advice about what settings to use what lenses might be best for job, backgrounds (i have my own ideas but just looking for suggestions)
I'm only a hobby photographer so easy terminiology etc appreciated!

Mainly taking shots indoors but have various different areas with plenty of natural light

many thanks

Added (1). Flash gun is 360 afd - fine compatibility wis according to my internet research! - but thank you.

Photograph his flutes? Not a lot you can do to make them ARTY…

flutes are long and slim and that's as far as you can go…

and it is difficult to do much more than show the interesting parts:

there are certainly no MAGIC settings…

Before you use that Jessops flashgun with that camera check very carefully with Jessops and with Nikon that the flashgun will not damage that camera. All modern DSLRs can only cope with a low trigger voltage and will quickly be put out of action and the circuits inside destroyed by a flashgun with a high trigger voltage. Do not ignore this warning - check and check again with Jessops and Nikon - if there's any doubt do not use that flashgun.

If your friend wants to put pics on websites, keep the pics simple, so maybe photograph on a simple cloth of contrasting colour to the flutes, maybe green. Indeed use natural light then you can see what is happening. Probably the 35mm lens will give best definition, but maybe a longer setting, around 50 to 80mm will give the best 'drawing'.

Firstly you should try to establish the end use of the photographs. If he is planning to sell them, I would suggest you keep things neat, commercial and quick, as once they're sold the photographs won't be of any use any more. If he's a flautist and wishes to have the images for personal promotion, or simply appreciation, then it may be worth putting the extra effort in since the images will be of greater value.

If it's for sales, leave it at a that, use a light tent, and the 55-200mm lens to produce reliable and clean images. If it's for appreciation, I think you need to understand flute music before proceeding. Flute is a very traditional instrument, and has a deep history, and you will need to tailor your style to the type of flute, it is however a woodwind intrument, and does produce an earthy sound (as opposed to the sound of brass which is very artificial and arrogant, and string which is a very delicate and empathic sound), and that should influence your work.

You will want to use a telephoto lens for this purpose, the flattening from these lenses will be quite appealing. Occasionally you may find the need for the wide angle to capture a bit of the environment. Work with natural materials as your backdrop, for Western flutes, work with darker woods, such as mahogany or oak, using a low key approach. Work both still life and perhaps some action shots. Combine this with a modern feel by including modern architecutural features such as french windows and modern furniture design in the far background.

I must say, this could be an easy project, but if it's for a flautist, it may become a complex mesh of music, photography and design.