Ok... By your answers then I know you kinda screwed, but not quite dead... what happens exactly is that you removed the main launcher, the interface between you and the device... if you say that it reboots, not much we can do here be cause we may push a launcher APK to /system/app (generally, there is where the "system apps" are located) and see if phone lives again, but as it is rebooting not sure if it can be done... Have critical info in the phone? If not, you can restore it to factory state!
Here is a external guide to restore the device back to factory state:
http://www.lg-phones.org/how-to-downgrade-lg-optimus-c-back-to-stock.html
Additionally, you can check some other info in this post (not quite your case but sometimes other problems have some clues to resolve main problem):
http://www.cricketusers.com/cricket...tboot-mode-started-udc_start-3.html#post12007
Keep us posted!
---------- Post added at 05:51 PM ---------- Previous post was at 05:40 PM ----------
There is one last option... Researching...
---------- Post added at 06:18 PM ---------- Previous post was at 05:51 PM ----------
Damn, no fastboot mode (at least you can't boot into it)...
Anyways, there is nothing worst than haven't tried at all... Do you have the Android SDK installed? Check
http://developer.android.com and install the SDK; also download a custom recovery from here:
http://unleashedprepaids.com/media/MS690/recovery.img... Once done that, remove battery from phone, replace it, in a command prompt (or terminal if using Linux), write this command "adb shell", just write it, don't press enter yet. Connect the phone to the PC and turn the phone on, while booting, press enter to the command and follow the guide here:
http://playfuldroidz.com/wiki/index.php?title=CM74OC#How_to_Install_ClockworkMod_Recovery: as fast as you can (copy/paste preferably)... if everything went well, now you have a custom recovery and you can backup the mess the phone is at right now (BACKUP, really, do it)... download and install any new custom rom and you are good to go...
Let me know how it went...