I didn't document rightly the process, so this time I've experienced petty issues during the deployment phase.
I'm going to report them hoping this could help someone's work.
If during the build phase you receive an error such as "Assembly name not found", you should check out that the actual assembly name is consistent with which used in the manifest file. You can edit the assembly name for a project by right-clicking the project, selecting Properties.
Other errors I've experienced are addressed by the following links:
- Custom workflow SPD2010 activity shows up but can't be selected;
- Error while connecting to a SharePoint 2010 web site in SharePoint Designer 2010;
- Failed to create receiver object when deploying solution.