Anyone do any Packet Editing here?

I looked at the TCP traffic from my network and the crossfire servers and collected a great deal of Packet Hex/Memory Dumps.

Most of them include useless information like peoples user names:
Here is a TCP Stream Example in ASCII:
combat!........................................... ...........................................R...... .....................#..............:GeNeRaLs:.... .................................................. .".0.th3_solider...........Prepare for combat!........................................... ...........................................R...... ...............d.....A............................ .................................................. .....hitman_shaw...........Think you stand a chance?........................................... ..................................t..Q............ .....W.rl.S.xy.................................... ....................&..c.[WK]*FreeDDy....................t..Q.................[R]eCoNeCT........................................... ............)....johnnyrock19....................t ..Q............................................... ........................................Estufah... .........................R........................ .................[L]atino$............................................ .................juandapos.............This means war!...................................


Couldn't I just capture GP/ZP packet data, modify the information, and send the modified GP/ZP packet back to the crossfire server?

This would allow me to get unlimited amounts of GP/ZP and also give me access to the games other on-server data as well.