U can try this method though I'm not sure whether it'll work or not:
Suppose ur new account name is "New_Acc" and older account name is "Old_Acc".
1. Goto "C:\Documents and Settings\Old_Acc" folder and copy a file "NTUSER.DAT" and paste at some secure location.
2. Goto "C:\Windows\Repair" folder and copy "NTUSER.DAT" file and paste in the previous mentioned folder "C:\Documents and Settings\Old_Acc". It'll ask to overwrite existing file, accept it.
3. Now log off and log into "Old_Acc". Now windows will create a new "NTUSER.DAT" file in "C:\Documents and Settings\Old_Acc" folder.
4. Again Log off and log into "New_Acc".
5. Copy the backed up "NTUSER.DAT" file (which we did in Step1) and paste it in "C:\Documents and Settings\Old_Acc" folder.
Pls read all steps carefully and do the same. It should help u.
PS: NTUSER.DAT file will be Hidden.