Greg, I gave you a quick answer on the other site to one aspect of your question.  Let me expand and add to it here.

Greg Cobb wrote:

I told him if he had agency work for me, runway shows or the like I'd be happy.  He then asked if I'd do a shoot of a runway show in 2 months.

At this point I get slightly confused.  In general, model agencies do not put on runway shows and don't shoot or use runway pictures for their models.  Apparently "generally" does not apply in this case, but it does make me wonder why.

Greg Cobb wrote:

How would I go about pricing the shoot for a runway show?  It's for 3 magazines, not sure of any other details until I meet with him.

Short answer:  I have no idea.

Longer answer:

Many magazines pay little or nothing for photos used editorially.  Some pay quite a bit.  Without knowing the magazine and their policies, it's impossible to guess.  In general I'd think the answer would be, "not much", but there isn't enough information to know for sure.

Prices for local photographers to shoot local shows generally seem to run in the very small number of hundreds of dollars unless there is something else that makes the shoot worth more, however.  The last show I shot, as the house photographer for a local designer in Houston, paid $300, and she wasn't happy about having to go that high.

Greg Cobb wrote:

I'm wondering though, if I answered that wrong?  I'm sure he wasn't asking to pay me referrals as a scout, or was he?

It's not universal (and less true for commercial than for fashion agencies), but it's not at all unusual for a scout to be paid for getting a model for an agency.  The payments, when made, vary, and can be from lump sum buyouts to percentages (typically 5%, sometimes 10%) of the model's earnings over a period of time (a year or more).

Often, to lock in the payment, the scout will act as a "mother agent" and have the model sign an exclusive management contract with her, which specifies that the manager take some (usually larger) percentage of her income from modeling.  Then, in effect, the mother agent sells that right (or part of it, in that area) to the agency for whatever percentage they can negotiate.

Hope that helps.

Greg Cobb wrote:

Which lens?  70-200? 

That's what I used to shoot NY Fashion Week shows, but it is way too long for the one I did in Houston.  Until you know the layout and where you will be there is no telling.  Bring a variety of lenses if you  can't get access to the venue in advance.

Greg Cobb wrote:

With a flash?  430ex?

I don't know.  Again, for the FW shows, no flash in the Bryant Park venues, sometimes it was needed in offsite locations.  It depends on what the lighting is.  Bring the flash unless you can find out you won't need it.

In Houston I was the house photographer, so I brought some studio lights and set them up in the corners.  No telling what your situation will be.

Greg Cobb wrote:

Manual or higher ISO?

No idea what this means.  Acceptable ISO is camera dependent.  I can get by with 1600 on my D700, but would prefer lower.  It all depends on the location and lighting, which is an unknown.

Greg Cobb wrote:

Lumiquest Mini-Softbox?

Another unknown.  You don't even know if you will need a flash, let alone how to modify it.  And you don't know how much room you will have around you.  For instance, try using a mini softbox here (the photographer's pit at a fashion show) and see how well it works:

Greg Cobb wrote:

The process for which shots to get:
a) shoot when they're at the top of the runway?
b) shoot at the top and when they're close to me?
c) several shots of each model?

What does your client want?