With the Android security model the folders for individual apps are essentially hidden from view, so to make custom templates available to WoAD you would go to (from the upper menu) Settings... Message template... Other templates location...
Here you can specify the folder that you saved your custom templates to. Under "Storage" you likely want to select "Shared" and then click on "Directory" to browse to wherever you placed the custom templates. WoAD will now use this folder to look for custom templates every time, so be sure to leave them in place if you wish to use them in the future.
For importing Contacts select (again from the top menu) Contacts. Then from the lower menu select "Import" and browse to and select the file you wish to import your contacts from. Once imported you can delete the original file.
Hope that helps,
Andrew
VA7YAA