Lighting help for 18-20 people in a warehouse setting

I'm taking an updated company photo next week. Being that it's getting cold outside and the outside of the building has no great backgrounds, I was thinking of shooting inside the shop/warehouse.
I'll have 18-20 people standing in front and among the products we manufacture. The lighting is decent (T5 florescent) but 24-26 feet (7-8 metres) overhead. I have a single 430EX II and can do wireless setup (just started doing OCF about a month ago). Should I shoot this bare, or will my umbrella (43") reflect and widen the light, or will it diminish it to the point of being no use?

This comes to mind:
http://www.robgalbrait​h.com …age.asp?cid=7-10046-10396

Assuming you can rent strobes of some sort. Course hte PLM isn't readily available so you'll need to find a substitute.

If you got white or light colored walls why not keep it simple and bounce from back wall? Jack up the ISO to get you f8 or so shooting aperture. Or put a big reflector above and behind you and bounce your flash off it.

It'll be out in the middle of a 40,000 sq ft building, so no walls to bounce off. I do have some large reflectors though, good call. Might bring in my gear later on this week and experiment with a few alternatives once the production guys have gone home for the day.

Would it be possible to build a wall of shipping boxes behind the employees? Display the items on other shipping boxes-at different levels/heights--or tables. Have them stand among the items. That might help concentrate light on the subjects, and depending on the color of the boxes--I'm guessing the typical light brown/caramel cardboard boxes--it might shift your color temp a little to a more pleasing warmer side.

Some of our products are about 8 foot high, so I'll be putting those at the back, then some are around 5 - 6' which will be wrapping around, and then the smaller stuff in front perhaps.

Okay... wall of shipping boxes, people positioned as mentioned... but you up on a ladder, shooting down.

I'll have to be in the picture too though. We have a scissor lift which I'm thinking of using....and a long remote cord.

if you go that route, might as well go over to the camera store and spend $20 or so on a Canon remote; set your camera to 'timer', and have at it.

Yeah I've got the TC-80N3 so I'll just do what I do for family photos. Set 10 exposures to roll off at 2 second intervals and give myself enough start time to get over in the picture.