You don't really install applications in a partition, you install them in an instance of an OS. Then during the install, generally, you can put the installed files in any folder in any local partition you like.
Some badly written programs, however, object to being installed on anything else than the same drive as Windows or the c:-drive. But that's an exception.
During the install, the installation procedure will make a shortcut to the correct location and put that on your (or the All Users) desktop or in your (or the All Users) Start>Program files in the instance of the OS that you are running in.
applications are installed in D partition and xp is installed in F partition. how can i create a link between the xp and applications so that i can eccess them with xp. originally applications worked fine with 2000pro which was installed in c partition. all these partitions are on the same hard drive.