have a look at the sticky post in this forum. there are a number of free programs which may do the job for you. http://www.guitars101.com/forums/showthread.php?t=23886
I use Cubase SX2, it is well supported, I like the results I get and it is (rightly or wrongly) regarded as the standard which other daw's (Digital Audio Workstations) get judged. Downside? It costs a packet
"All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a fresh water system, and public health, what have the Romans ever done for us?"