Hi Raven, as Ross mentioned, don't worry about the extra length... i'm running about a meter from keg to tap and am now getting great pours...
It sounds like it is overgassed to me... I would try turning off the gas at the reg, give the keg a bit of a rock/shake and then leave it for 10 minutes and then vent the gas from the keg (have a teatowel handy in case it squirts). Turn the gas back up to serving pressure and then try pouring a beer... Depending on your beer temp, you will probably want 85-95kpa but there is a simple chart in one of the articles on kegging that should point you in the right direction...
Set the flow restrictor to the slowest you can while still gettting a smooth flow... this negates the need for the metres of line between the keg and the tap...
Also, a warm tap can cause some foaming at the start of a pour... I find that I have to pour 1/4 glass of foam, tip that out and then it is all good as the tap has cooled...
Once you have it in balance, then it is pretty much set and forget...