How did you end up "attaching" everything to the SSD???
Your desktop and all the other bare necessities are a part of the OS, even though you can customize the life out of them.
The only things that you need to change or change paths of to save space on the SSD maybe stuff like the Location of My Documents, Outlook etc etc
Also by default most programs install on the C drive, that is something that is fine with programs but for games it's a different story.
You can change the path of the installed files by directing the installation program to a different path on another drive while in the process of installation, for My Docs and outlook, you can easily change their Paths by right-clicking on the My Docs folder and redirecting it to a new one and for outlook , by changing the Data Folder in options.