You'll also need to increase the clock divider by a factor of about 3 (and possibly the number of bits in the clock divider).
You can define your components in a separate .vhd file containing only the package declarations. You'll need to compile this file before you compile the .vhd files that use these components. This is the preferred approach.
You can also put the package and component (or just component) declarations in the .vhd file where the components are used. In this case you'll need to copy the package and/or component declarations into each file where you use the components.