If your version of Launcherpro is expired and you can't manage to get out of the browser it keeps popping up, you can download Launcherpro 0.8.2 from Fede's website, change the extension from .zip to .apk (make sure to show file extensions for known file types to prevent it making it .apk.zip), and move the apk to the tools directory of your adb folder. Rename the apk to Launcher2.apk, fire up adb shell.
adb pull /system/app/Launcher2.apk Launcher2.apk.old
adb push Launcher2.apk /data/app/Launcher2.apk
reboot
This will remove the old installation which is usually put in /system/app/ for ROMS for theming purposes and install the new one to /data/app/ where it can be updated via market in the future. Make sure to delete the Launcher2.apk.old file after you are done. Note that changes to system files require a reboot of the phone to take effect. if you want to move to system afterwards, make sure to chmod 644 for the correct permissions.