Форуми / Cotonti / Skins / SED-Dark (3 columns)

so, i am administranting www.shrooms.lt and i have choosed SED-Dark skin, and the right side weights much more than right, so i need a third column. and again, i have failed. those padings.... i will tryy to show you, what i made, and can any 1 help me to fix this?
so the first problem is that empty space marked as 1
the second problem is that there is no space between girst and second columns. its marked as 2
and the third problem is that there is a big space between second and third columns.
so can any 1 help me? please...

i am using 0.0.8 version

Added 17 minutes later:

and again, can u tell me how to make smaller that annoying 1st spot?

Added 18 hours 2 minutes later:

Never mind, i have choosed other skin, and modified it