[Koha] System preferences: template

[Owen Leonard]

I should remember this, because Chris probably told me just yesterday:  When 
you change the default template via the system preferences interface in the 
intranet, how does it remember your choice?  Does it set a cookie? Or is it 
some kind of session variable (which I know from ColdFusion and PHP)?

I ask because I'm trying to mess with the templates: I copied the 
/usr/local/koha/opac/htdocs/default folder, renamed it to 'npl,' and made some 
changes.  But when I go into system preferences and specify 'npl' as the 
template, I don't see the changes.

  -- Owen