Use a text editor such as notepad to edit the "profile.con" file in the "\battlefield 2142\profiles\0001" directory. It should be similar to this:

LocalProfile.setName "user"
LocalProfile.setGamespyNick "user"
LocalProfile.setEAOnlineMasterAccount "user"
LocalProfile.setEAOnlineSubAccount "user"
LocalProfile.setTotalPlayedTime 25467.3
LocalProfile.setNumTimesLoggedIn 9805
LocalProfile.setRank 0
LocalProfile.setCareerPoints 0
LocalProfile.setLastBaseUpdate 0

Change the "localprofile.setrank 0" and "LocalProfile.setCareerpoints 0" values to:

LocalProfile.setRank 43
LocalProfile.setCareerpoints 54100

Note: This procedure involves editing a game file; create a backup copy of the file before proceeding.