Can someone write me a script

That runs emerald theme manager on startup and runs this command once i click a theme emerald --replace.

so i dont have to do that everytime i startup

[Kamisama]

$HOME/.config/autostart

Look there. It's the gnome autostart folder. It loads scripts after user login.
Also, build your own damn script.

If [ that don't work ]
then
If [inside ubuntu..]
then...
System -> Preferences -> Sessions
-> Add
fi
fi

i dont know how to script. any links to show me?

[Prometheum]

This is a bit of a problem with Compiz-Fusion's configuration as of 8.04.

I can't say this definitively, because I'm not on Ubuntu at the moment, but I fixed this by setting the window decorator (System>Prefs>Advanced Desktop Effects Settings (ccsm-advanced or advanced-ccsm, one of the two, apt-cache search ccsm will bring it up)>General (or something to that effect)) to emerald --replace.

I guess the GTK window decorator loads before Compiz Fusion kicks in, so emerald alone won't replace it. If you want emerald --replace to run every time you change a theme, well, I don't think you can do that, and its not needed either, because emerald auto-loads the themes you select in the theme manager.