Software deployment over WAN with Distribution Servers

(Sorry if this is a double post, don't think I was signed in the first time)

I've just installed Desktop Central and we have 1 head office and 7 remote offices.

I've deployed the distribution server software to the remote offices and they show up in desktop central as remote offices. I've also deployed agents at the remote offices and they seem to report in the way they should.

My OU structure looks like this:

---- HQ (192.168.1.0 subnet)

|--- RemoteOffice1 (With DistServer1, and Remote1-clients) (192.168.11.0 subnet, 2 MBit connection)

|--- RemoteOffice2 (With DistServer2, and Remote2-clients) (192.168.12.0 subnet, 2 MBit connection)

... and so on

I've created a software deployment task to deploy "Adobe Reader 9.3" (EXE) to the OU "HQ". By this, I want Adobe Reader to be installed to all computers in the HQ OU and all OU's under the HQ OU, remote offices included.

I have a central software repository at the HQ: \\HQFileServer\Install$\Software, and defined as such in DesktopCentral.

My Adobe Reader 9.3 package in DesktopCentral looks something like this:

\\HQFileServer\Install$\Software\Adobe\AdobeReader93.exe and switches for silent install etc.

All users and computers can access the share above.

Now, I'm wondering a few things:

1) Will the Distribution Servers pick up the software from \\HQFileServer and store it locally before it is pushed to clients? If so, when does this occur and how can I verify this? Will the software then be removed from the distribution server when all computers have got the software installed or will it be cached until I remove the configuration? If I update the AdobeReader93.exe, will that change be noted by DesktopCentral (if filename is still the same)? Or do I have to re-deploy the configuration?

2) Will the Distribution Servers pick up the task to install the software, send it to the agents in the remote offices, and will the agents then pick up the software from \\HQFileServer \ share and install it over the slow WAN links? If I have 5 clients booting up at the same time, and all 5 of them tries to pull 50 MB of software over the WAN-links, it will be slow as hell...

Hope you can help.