Hi Kristian,
You should try changing the references to 'cmsa' in the following files:
[...\SA_SDK_9.5\CorrespondenceManagement]\
FSIApp\Portal\webapp\ClaimsPortal\pages\CreateCorrespondence.jsp
FSIApp\Portal\webapp\ClaimsPortal\pages\HomePage.jsp
FSIApp\ManageTemplates\src\config\dct-config.xml
FSIApp\CreateCorrespondence\src\lcds-config\flex-config.xml
FSIApp\Portal\src\com\adobe\icc\bootstrap\URLRegistryBootstrapper.java
FSIApp\Portal\webapp\WEB-INF\web.xml
FSIApp\Portal\resources\cm.properties [add a property here 'pscmContext=/{your context}'. For e.g., pscmContext=myprojectname]
FSIApp\Portal\resources\security-config.xml
However, I would say that it is only partially possible, because there are a couple of components that rely on 'cmsa' as the URL's context root, and hence would not work if you change it.
Those are the LCM Plugin Bootstrapper (which is used to bootstrap CMSA from LCM plugin) and the ImportUtility (which is used to import an exported ACP onto a target system) . But may be you can live with that.
Cheers,
~S.