I didn't have exactly your problem but i did have this:
When adding new customer through admin, this error:
Parse error: syntax error, unexpected $end in C:\Program Files\Apache Group\Apache2\htdocs\catalog\admin\includes\modules\account_details.php on line 486
haven't been able to fix this either. Tried the different version of account_details.php in step by step with no luck. If i figure it out i will post a reply