WOW, what a question, but one that many people have asked and will continue to ask so I decid_edd to throw my FWIW answer in.
This answer assumes you have WK3 installed on scsi drives in some sort of array. And that you can perform complete backups and have the luxury of 'downtime' where the server can be offline while the work is done. Even with that this answer will be as generic as the question. And you will end up asking many more before it is all through.
Yes, you can buy bigger disks and image what you have onto them and it will work, most of the time.
My guess is the simplest way would be to wipe the data partition and expand the C drive onto the unpartitioned space.
Another posibilty is to buy bigger drives and let RAID work for you.
- 3 disks Raid 5
- In this arrangement you still have many choices such as what kind of partitions were originally configured, some work (for expansion) better than others.
- Windows itself has a 'partition size changing' program, but they are quick to point out that it does not work on the 'system' drive. Opps
- 4 disks mirrored
this arrangement may be the easiest, but costly. Or it may not work at all.
Here we see the need to redo partitions, again. Or buy a bigger disk.
- Server 'ROLES'
If this server talks to other servers or applications there will be some foresight and repairing needed
- Adding a disk
this is what the business manager thinks is all you have to do and wonders what the fuss is all about.
- There are many 'scenarios' and several 3rd party tools you can buy: what exactly is your budget? would be a great question. They are not often cheap.
The answer for you will lie in where your energies and skills take you. Do you want, for whatever reason, to add space to the C drive. Or would it be better to rebuild the server and then add it back in? Ghost works very well and is quite popular and I see it used everywhere. I have also seen it fail. No matter which route you choose there will be much required and more will be revealed as you work through the process. Good Luck and Have Fun.
Windows.0 usually is a second windows folder, perhaps a second installation exists on your server. Try this KB article: http://support.microsoft.com/kb/888023
Netmeeting keeps coming back: don't you love windows and its auto everything? I have never dealt with this.