Sorry getting so late to this, but I saw your revision to SEUM and changed it back with some caveats that it does run from its .exe if no Steam installed, Steam is renamed, or if you use a funky steam_appid.txt file to its root directory (I just learned that trick from Lateemu). Try it out to confirm, but seems to run without Steam required now.
Topic on User talk:Baronsmoki
Yep, adding the steam_appid.txt file worked. Thanks for adding the instructions to the page.
Good to hear and very welcome!