George:
My advice is to leave them, and I'll explain why:
First off, 4G sounds like a lot weight, but when you consider your primary drive space is probably 500G and cost you maybe 20 cents a Gig, the "burden" of those drivers is pretty nominal.
Second, you'll note a little added goodie in Leopard called "Bonjour." It does a few things automatically, and one is find network printers and automatically loads a basic, but proper driver when you have a net connection, wired or wireless. I discovered it by accident one day as I needed to print a document, did the Cmd+P and saw a pair of printers available, and wirelessly to boot, yet neither had been installed by me! So I chose the Brother first and hit print, then chose the HP next and hit print, went to each printer and found perfect copies of my documents on each.
IOW it's pretty darn convenient, especially on a laptop where you may be printing from anywhere...
Of course the OS is smart enough to load a proper driver any time you plug a printer in directly, but it is a basic one. So for example on a photo printer like your large Epson, you'll need to install the proper drivers and associated software.
PS: You'll also find like 2G of built-in sounds for "Garage Band" -- and if you are anything like me, that's a program that has never even been launched on my system!
Cheers,