I've installed a lot of crap ware and I'd like to start again with a fresh install but I was worried that by having a fusion drive that the procedure for reinstallation might be different.
There is nothing special about a Fusion drive once it's been created. Just erase the volume and re-install from the Recovery Partition.
However: installing "crapware" is still not really a reason for reinstalling the OS. Most apps can just be deleted from the /Applications folder. If anything used an installer to place stuff all over the place, then there is usually an uninstaller option in the package.
Apart from that, removing any files from the LaunchAgents, LaunchDaemons, StartupItems subfolders of the /Library and ~/Library folders should stop anything insidious. Also check the LoginItems pane in System Prefs > Users.
I recommend the utility Pacifist, which can browse inside Installer packages, and show you what it installs where. You can then delete the relevant files.
You can also restore your system from a Time Machine backup made before you added the crapware. (Though you will have to manually add any files created or modified after that date.)
Otherwise, if you reinstall the OS but restore your complete user account, including prefs, settings, and anything that the crapware left in your user Library, then you still haven't necessarily solved the problem.
