Team salary cap space

I can't trade players with teams witch don't have salary cap space and I can't sign free agents too..
So i would like to know, Is it possible to increase the salary cap limit to all teams?

There was a tutorial round here for 07
Try to use the search function

You can find a tutorial on editing the salary cap here. Otherwise, there have been several tips on clearing cap space the legitimate way posted here in the Dynasty section.