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		 a CDRW drive can most assuredly only handle CDR and CDRW media.  
 
You may wish to invest in a DVD-RW drive. Most of the chain stores have them as far down as $75 after rebates... 
 
If you're addressing the CDRW drive with a backup, rather than cd-burning, program, such as Retrospect, TapeWare, Veritas BUE, etc, you should be able to span backup jobs across media. 
 
Otherwise you could try a Zip or Rar program and make 650mb segments... 
		
		
		
		
		
		
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