Don't worry I ran into the same problem relocking my phone. First you need the sighned shipped rom exe. next take your SD card out because it interfears with the flash process especially if you have a RAPHIMG file present in it. Flash using your computer and thats it.
Here is the link to find to shipped rom exe.
http://forum.ppcgeeks.com/showthread.php?t=42741
What happened is your phone is locked again but messed up the rom thats why no custom rom will load. Shipped rom will rewrite everything.