Records your Guitar and add some drums and bass on the background? Is there such a program for PC?
If so, please tell me.. ;)
There are hhundreds of retail software that allow you to record to your pc and ad rythm section. Unfortunately most of them are well beyond the $500 mark. There are cheaper programs. The highest end of which(the cheaper ones that is) is Cakewalks Sonar and also from Cakewalk are Guitar Studio and Home Studio. Even cheaper on the home user scale is Musica Creator which is also from Cakewalk(the potential of which is highly dependant on the quality of your sound card.). From Emagic, the makers of Logic are the Magix line of software which range between $30 and $70. There are numerous other ones. There are also some free software which you can download but are feature limited.
Here's a link to a post that I put up earlier this year.
http://forums.guitarnoise.com/?board=sound_studio;action=display;num=1066691820
have fun.