I have setup my linux system to be a part of my Windows 2003 Server Network using Kerberos / winbind / pam etc...

I can see my linux system in active directory computers. I can see my mounted drive folder. When I try to access my folder it tells me the folder is not accessible.

Please help me understand/fix this.

You likely need to connect with alternate credentials, try mapping to a drive letter instead and use the credentials of an account on your linux box.

I map the drive from the windows xp explorer (I choose login as different user). It attempts to connect and then prompts me for user credentials. I enter \\linuxcomputername\username and password. It does not recognize my credentials.

OK
I mounted the drive as follows:
mount -t ext3 /dev/sda5 /mnt/lib/vmware
I then remounted the drive as follows
mount /mnt/lib/vmware -o remount,acl,noatime (I added this to /etc/fstab)

I then added the following:
chmod -R 770 /mnt/lib/vmware
chown -R root."domain group" /mnt/lib/vmware

My windows account is a member of the domain group and the linux account is a member of active directory.

I can access the linux computer name from my windows xp workstation but I get a access denied error when I try to access the vmware drive. I also have my smb.conf file configured properly and I get no errors when I run testparm. Forgive me I am all over the place. I just don't understand.

Will anybody out there help me?

Don't include the \\computername just try username and password, can you authenticate via the smbclient on the local linux machine?