Both .dmsm and .dmsd files are projects from Roxio software. However, it doesn't seem likely that one can be converted to another. They can just be exported to finished multimedia content or burned on media discs.
Convert Roxio Creator VideoWave movie project to Roxio Creator MyDVD DVD project.
We found one software available in the database for this conversion.
Microsoft Windows software - convert dmsm to dmsd on Windows
Roxio Creator is set of tools used to burn CDs, DVDs and Blu-ray discs
Convert from dmsm file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.