You can use an engine immediately after the build completes on the computer that built the engine. SlateMT immediately adds the engine to your inventory for your CATs to find. No extra steps are required.
SlateMT has export and import menus to help you deploy engines to other machine machines. You can build engines on one computer and use them on another. This is useful for translators who want to use engines while traveling to a conference. Agencies use this feature to build engines on one machine and pretranslate packages on another machine to send to translators.