You can usually run (not import) a SQL patch directly via your phpmyadmin. The one caveat is that, while the Install SQL Patch tool will replace any table names with your DB_PREFIX, that won't happen under phpmyadmin. If your DB_PREFIX is null (''), then you're good-to-go; if not, you'll need to edit the provided .sql file to add the prefix (e.g. customers becomes zen_customers) before running the SQL script.