To install KSpread from precompiled binaries, you should:
Ensure your computer has all the required software (excluding KOffice of course), is installed. You can find the system requirements under System Requirements.
Download the KOffice binary (***Insert filenames (rpm and deb and tar) here***) into a temporary directory.
If the file is a .rpm (Red Hat® Package Management Package), KOffice can be installed with: rpm -U filename
If the file is a .deb (Debian Package file), KOffice can be installed with: dpkg -i filename
If the file is a tarball (ends in .tar.gz or .tgz), KOffice can be installed with tar -xzvf filename
You can now start KSpread or you can go through a Step by Step which will help take you through a sample document.