Originally Posted by kimchee
Ideally I would like Samba to work from my original domain account. How? Like i said previously, when i get the login prompt, the username field (linux_ip_address\Guest) is grayed out, and so is the down arrow and the [...] button just next to the user name, preventing me from changing the username.
I've only seen that particular behavior when something is fundamentally wrong with the networking or configuration. Probably simplest thing to do is to pick one of these these options, and then setup things appropriately:
Best choice - don't run Samba on the RHEL instance. If all that you want to do is move files between the host and the guest then the "shared folders" feature of VMware is easy to setup, and you don't need to make RHEL a Samba server at all.
Next best choice - make your local, Windows domain, and Samba accounts have the same name and password. Windows should then work with the domain account without prompting you ("pass-through authentication").
In the second case, you should probably go back to the initial Samba configuration file, but change the security mode to "user". Samba has many options, but the defaults work, and people can get into trouble by changing more settings than they needed to.