TH3 Cakewalk is not sold separately. It is only bundled with SONAR.
All versions of TH2 and TH3 bundled with Cakewalk DAWs have the ability to add module presets and user patches. Rather than rewrite the manual, open the TH2 Creator plug-in and click the Manual button in the bottom right. The default location for the manual is
C:\ProgramData\Overloud\TH2 Creator\TH2 Cakewalk Manual.pdf. Page 13 discusses module presets. Pages 14 through 17 cover the patch management system.