This assumes you've broken your phone from Jail and have installed iPhuc.
If you haven't, that guide can be found here:
http://www.modmyi.com/wiki/index.php...g_iPHUC_iPhone
1) Download SpringBoard.strings from here:
http://www.modmyi.com/forums/downloa...do=file&id=163
2) Open it with Text Edit
3) You'll see this in that file:
<key>AWAY_LOCK_LABEL</key>
<string>slide to unlock</string>
These are the 26th and 27th lines in the file, respectively.
Change "Slide to Unlock" to say...whatever you want! Try to keep it to 16 characters or less (Including spaces). 17 or 18 MIGHT work, but I've only verified up to 16. Too long and it'll be cut off with an "..." at the end.
In addition, practically everything that isn't IN CAPS and is between <string> tags, can be changed to whatever you want. So, when you get a call and the "Accept" and "Decline" buttons can be changed to, maybe, "Friend" and "Loser."
4) Save the file and put it in phonedmg/iphuc/iphone/trunk/iPHUC
5) Open terminal and put in: "cd /phonedmg/iphuc/iPhone/trunk/iPHUC" and press enter.
6) Next: "./iPHUC" and press enter.
7) Now put in: "setafc com.apple.afc2" and press enter.
7-a)If you get the "InvalidResponse" type: "exit" [enter] "./iPHUC" [enter] "setafc com.apple.afc2" [enter]
8) Now you should have the iPhuc prompt. Put in "/System/Library/CoreServices/SpringBoard.app/English_lproj/" and press enter.
9) Now put in "putfile (Drag SpringBoard.strings into the terminal from Finder) and press enter.
10) Put in "cd /System/Library/Lockdown" and press enter.
11) Put in "putfile (Drag Services.plist to the terminal from Finder)" and press enter.
12) Put in "exit" and press enter.
And THAT should do it. If, for some reason, it doesn't work -- I ended up copying SpringBoard.strings to both /System/Library/CoreServices/SpringBoard.app/English_lproj/ AND /System/Library/CoreServices/SpringBoard.app/ just in case.
Good luck.