Voice Recognition software recommendations please

[MorseLady]

My husband has nearly lost the use of his hands through very severe RA and resultant deformity and can barely type and then with his knuckle. He wants to run a genealogy application that requires a lot of input and type letters and I have suggested voice recognition software. Can someone please recommend software which is easy to set up and use as due to his pain and medication he has difficulty learning and remembering and gets upset very easily if things go wrong and is not too good with computers. Not too expensive preferably. I have had a look on Download.com but knowing nothing at all about this field do not know which trials to download. Is voice recognition now reliable?

The computer is a 3ghz P4 with lmb RAM and 160GB HDD running XP Home SP2 and the sound card is onboard and is a good one. Not sure what hardware Voice Recognition uses but the computer does have a voice fax modem which is not being used as we are on broadband.