I had great fun acting the contortionist replacing the accelerator cable and the clutch cable, both are actually fairly easy to do and will only take 15 mins each. I found it useful to put the drivers seat riiiight back and then lie down looking up at the pedals with a torch in your mouth, unhook the cable and then under the bonnet pull the cable through and then replace. The clutch cable is a little more fiddly as there are a few metal clips at the clutch end that need clipping back in after is has been swapped. Once both have been replaced, especially on a high miler it feels like a completely different car.
The handbrake cables are a little more fiddly as it basicly means having the bulk of the car lifted clear off the ground, which in my case would have been a nightmare seeing the slope the car is parked on. I gave mine to a garage to do which along with a cambelt, rocker cover gasket, full oil change came to ?100, I didnt get a receipt for it tho ;o)
Certainly dont pay more than ?50 to get it done as it is a quick job to do given the right tools and working conditions.