This his nothing to do with MS Office, so you post on the wrong forum. You might get more or better respons on the XP or the Computer Help forum.

I would think that both Application Data and Start menu are required in both accounts, so it's a rather strange situation.
I would copy the things you want to save from these accounts (can't be very much, I should say) to a safe place in your own (administrator) account, then delete the accounts from Control Panel>User Accounts (or whatever the English term is). See in Explorer if anything is left, and delete that also.
Then make 1 (ONE) new account, and copy the saved things into it.

Hope this helps.