the DEMOQE128 comes with USB programmer.if you are using CodeWarrior you can find an option for programming under Debug Menu and you have to select the type of programmer(not sure it might be USB multilink ).it gets connected with Demoqe kit and u can fuse the program or debug..
I would recommend first download CodeWarrior SE v6.2 which is the latest version and you get a free license limited to 64K and a few number of files (which I think is enough...).
Connect your board to your PC and install the P&E USB drivers (driver wizard should appear two times). Then launch CodeWarrior and open an example program (or your program if you have written some code). Click in the Debug icon and this will compile the code and launch the debbuger. Device is automatically detected and you have to click in the connect button and say OK to erase and program the device.... then you are done!