Originally Posted by boricuaace
I have a newbie question...if i've never themed my G1 ever before, could I use the updater to download a theme and install it just like that or does it involve me doing other stuff as well. and if i do theme, do i lose any apps on the phone or anything like that? sorry i've search for my questions but didn't come back with good results.
There's no yes/no answer to your q but:
"Just like that" is up to interpretations, but the CM updater is intended for download and install of both CM ROMs an themes for the rom you have installed. You don't have to do anything the CM Updater doesn't provide.
You shouldn't lose any apps you have installed, but it's up to the theme maker to replace apps with other versions of the same (launcher, browser, Maps & cetera are common targets for this)
Check the theme thread before installing any theme, and don't install theme on theme without going back to stock CM between themes. Different themes replace different parts, and some wont work/will limp if you don't apply them to stock CM