Software Deployment

So, currently have our KACE system setup to where when I deploy software, the agent notifies the user of the upcoming change, and upon them selecting continue, the software begins to download and shortly thereafter, install. However, due to some of the sizes of deployments that I'm doing (1GB worth of updates to 100+ machines), I wish there was a way to first push the software to the machine, to ensure it is downloaded successfully, then prompt the user to perform the install (and if they don't respond, perform the silent install without them) as quickly as possible. 

All 100 machines are scattered around the nation, and not enough of them are at a central location to make replication feesible. Any method in which you guys know how to get the software to the user first (let's say Monday), then fire up the agent to perform the install (let's say Wednesday)?

Thanks!