I would find the teaching hospital closest to you that has the largest liver center. I would take your sister to a hepatologist, not just a gastro.
Here's a link to some clinical information regarding combo tx with interferon/ribabvirin for patients with compensated cirrhosis. (It appears to have more success in genotypes 2 & 3, but does have some success with genotypes 1 & 4.
http://www.hivandhepatitis.com/hep_c/news/2006/120806_b.html
Here's info from a study published in 2008 talking about regression in cirrhosis from tx:
Regression of Cirrhosis in HCV
Study findings suggest that HCV treatment can lead to regression of cirrhosis.
— Atif Zaman, MD, MPH
Published in Journal Watch Gastroenterology November 21, 2008
Covering Ann Intern Med 2008 Sep 16; 149:399
http://gastroenterology.jwatch.org/cgi/content/citation/2008/1121/2
Good luck to you and your sister.
No doctors here, but the experience of many of us patients is that early, compensated cirrhosis patients can be successfully treated with peginterferon therapy to kill the hepatitis C virus. Successful resolution of the virus usually causes a regression of fibrosis (scarring of the liver) and allows the patient to back away from end stage liver disease and lead a normal life. Please take your sister to a gastroenterologist with experience in treating liver disease. He will assist your sister in making the proper treatment decisions.
Dr. Aftab, there are no doctors in this forum. I hope you find the answer you are looking for.