Suite Upgrading from 384 to 401

[محروم.كوم]

When upgrading from v384 to 4.01. Do I just run the 4.01 upgrade script and run through?

Before I begin Upgrade from 384 to 401, is the following correct:

Pre Upgrade:

1. Disable any Plugins
2. Backup database

Upgrade:

1. Transfer v401 upload directory to server ( Do I overwrite only if newer files or overwrite all files) ?

2. What about the config file. The current config.php is for 384. Do I have to do anything with the config file or just use the current one that was already there?
3. Run upgrade Script

Is there anything else I need to do or be aware of?

thanks,
nk __DEFINE_LIKE_SHARE__