Ok, on my CRX it has a SIR-G cable LSD trans....No issues when driving/cruising around normal, but I realized when Im 'gettin on it' or running it hard, sometimes the clutch likes to stick on floor, and wont disengage. First couple times it did it, it just sat on the ground a couples or less, than came back up. Earlier today, I actually had to lift up on it with my foot.

So--Any idea what is causing this? And how to go about fixing it?

you can replace the cable
you can check the return springs on the clutch pedal it self.
you can lick my balls.

How hard/involved is it to replace the cable?

Eloborate more on "check the return springs" lol. How does one 'check' a return spring

its easy to replace.
Make sure its there.