walk cycle and fast run cycle

I need someone to make a nice walk cycle and a run cycle as I have not myself by now been able to do this… I´m working in version 2.68 a.
I´m working with a simple low poly mesh/armature but with “realistic” movements, and I need a good looking walk and run cycle.

I have attached a picture of the armature I´m working with. please let me hear from you, if you think you might assist here…and tell me whatever information you need - apart from the .blend file with mesh and armature:o

Does the rig have IK solver in it? especially the legs to avoid sliding. Take a look for my animation reel at oha-studios.com and contact me at : [email protected] if you interested.