This is actually a fairly simple hack using WPE (winsock packet editor) to change your name in chat.
1st. Get wpe here
http://wpepro.net/
2nd. fire up rf in window mode, as well as start up wpe
3. log in and get to your hq area or werever you want to send the message
4.in wpe press target program and choose rf_online.bin
5. go to options and set it to moniter send and sendto
6.press the start capturing button and say something in game
7. stop the capturing and begin looking through the captured packets for what you said, it should be mixed in with some hex numbers but it is still readable
8.right click on the packet once you find it and press set send list with socket id and then add to send list
9.check the packet in the send list and then press the pencil icon to edit it
10. change the name and the message to what you want
11.click ok and make sure the packet check box is checked
12. now hit the send button and set it to however many times you want it to send and then press the play button
it should then show up with another name and the message you put in
every now and then it will disconnect you but most of the time it works great, have fun