I should not help you since you choose to post this three times.
Install the ndiswrapper packages found here;
http://atrpms.net/dist/fc5/ndiswrapper/
You need to have the kernel-devel rpm packages to build ndiswrapper as shown by your error;
Can't find kernel build files in /lib/modules/2.6.15-1.2054_FC5_FC5smp/build;