NEED HELP!!! By mistake i deleted my version.txt o my psp slim hacked 5.50 GEN-B2?

Well the title says it all. I deleted it by mistake now when i start the psp up this message shows up and it wont let me do anything but turn the psp on."Attention Captain D$#$##@s, you broke something in your flash. Go Back and fix it. Stupid noobs...~Xander". PLEASE HELP!!