Drivers for Opti 7010_SFF

I've been tasked with getting drivers for multiple OS'es for an Opti 7010_SFF desktop.  When I add a driver to my download list, some of them ask if I want the Dell Update Package.  I'm not sure what that is.  I've been downloading both, and extracting to the same folder, while canceling any auto-install that runs post-extraction.  The drivers are then moved to a share that is accessible during the provisioning process.  We use LanDesk and a hardware independent image process, which is why I need to have all the correct individual drivers.

So, what is the Dell Update Package, and do I need it or can I just use the other file to get the drivers I need?

Also, are the drivers in either digitally signed?  I was told it made a difference on chipset files, and digitally signed were preferred.

Thanks

Rick