Obtaining a Windows 2003 Drive Image

OK..Here is what I have:

 

Windows Server 2003, Standard Edition, Service Pack 2, Active Directory Domain Controller Master.  The C: drive is rapidly running out of disk space.  I purchased a new 1 Terabyte drive and Windows Ghost 15, but it tells me that my OS is unsupported.  I know ghost works fine as I did it to another computer with Windows XP.

 

Does anyone know of an inexpensive app other than Ghost that I can obtain a drive image from a server computer? Symantec Enterprise edition, Acronis and Kace are out of my budget as I am a small business.  I need to get this drive image before my computer runs out of space and crashes.

 

Thanks in advance,

Fredhead