Bootcamp is just a GUI for a
command line utility built into OSX. You can repartition the drive yourself if you know how to use this command.
You don't actually need bootcamp to install windows. The mac is already set up out of the box to run windows. If you pull your hard drive out and stick in a blank one then you can install windows fully without ever using the "bootcamp" utility.
As for the bootcamp drivers, the time limit is only for the overall installer. You can install all the drivers yourself one by one if needed. If you don't have the driver CD burnt then you can just open the contents of the bootcamp assistant in OSX and find the DMG for this CD inside.