The first and more tedious way would be to manually (or in a script) push them to the browser PCs. This would entail copying the printx.ocx and mapimail.ocx files from the DVWeb server location (typically C:\Program Files\CA\UnicenterOutputManagementWebViewer\ActiveX) and writing them to a suitable location on each of the browser PCs, like c:\activex\. You would then have to register these controls by running the commands, "regsvr32 printx.ocx" and/or "regsvr32 c:\activex\mapimail.ocx" There's a potential ramification: applying any maintenance or installing any upgrades where these controls have been updated would necessitate your pushing the new controls out to all your users/browser PCs.
A better method of distributing these files is to allow Web Viewer to do it for you by making the Web Viewer server a trusted site in each browser accessing it. You can do this from the Browser by clicking on Tools, Internet Options, Security.
In the Security panel, click Trusted sites, Sites and add the fully qualified name of your Web Viewer server i.e. https://DVWEB06.Target.com. Once this has been added, ActiveX controls from this server will be automatically installed and registered. This benefit of this method ensures that future Web Viewer ActiveX control updates on the server are propagated to the browser PCs without further intervention.