Make a bootable USB-stick and install from it. Then you can try different settings,
driver-preinstalls, and other tweaks out without having to use a DVD every time. And it is much faster to install from USBstick than from DVD

How to do it?
<cut&paste>
Step 1. Format the USB Flash Disk
Run CMD (elevated) and type:
diskpart
list disk (*now find your USB disk number, you'll find it by its size)
select disk 1 (*if your USB is disk 1)
clean
create partition primary
select partition 1 (*this is 1, no matter what number is your USB disk)
active
format fs=fat32 (or ntfs, works with both)
assign
exit
Note: Don't type the things in parentheses above!!
Step 2. Copy Windows 7 or Vista's DVD content to the Flash Disk
Still on CMD, assuming your dvd is drive d: and your usb is drive e:
xcopy d:\*.* /s/e/f e:\
You're done. Works perfectly.You'll make the fastest install ever.
And after that, you can then change what you want on the usbstick before installing the OS.