By default TransMagic requires a "Power User" account. However, you can give a Limited User account specific rights to the areas of the registry that TransMagic accesses and also it's DLL (System) directory. To run TransMagic on a Limited User Account you will need to give the account read\write access to the following areas of the registry:
NOTE: Be sure to test your settings with the user account by creating a dummy key and entry. For example create a key under these entries named "DummyKey" and then create a string value under that such as "DummySubKey" and give it a value of "0000". Then delete the DummyKey entry. If you are able to to that then you indeed have full read/write privileges.
Also, you will need to give read\write access to the following directory on the hard drive:
%ProgramFiles%\TransMagic Inc\TransMagic R8\System
NOTE: Be sure to test your settings with the user account by creating a dummy text file under the TransMagic System directory. Right click and create a new "dummy.txt" file and delete it. If you are able to do that then you indeed have full read/write privileges.