Creating a backing track

I dunno If this is posted before but really..I'm new to this, so pardon me for being a noob.

What software program do you suggest in which you can create a custom backing track for instrumental guitar (think satriani,gilbert,petrucci,shawn lane,govan etc )? I'm thinking of creating rhythm,bass,drum lines which is also easy to use at any situation and has a good/high quality studio sound.

I need it to be computer friendly, meaning it doesn't gobble up a lot of memory/RAM.

I have a guitar rig 4 installed in my laptop (sony vaio..an old one VGN series). I dont have the rig controller. I just plug in the guitar straight to the mic input.

Thanks :)

I like a program called Jammer the best. I find it easiest to use. I got it free with an old version of Cakewalk I bought. Easy to pop in drum fills. Lots of styles.

I Like Reaper for recording tracks if that's what you mean.
http://www.reaper.fm/

Audacity Is also a pretty good free one.
http://audacity.sourceforge.net/

I use Sibelius for making my own backing tracks if you're into writing it in. It has great playback sound but it IS a memory hog AND costly. Top notch though for writing music.
http://www.sibelius.com/