^Is that your PC?
1.) No, you need 168pin, not 184pin, the 184 would not fit.
2.) Yes, but you need a different type of RAM.
3.) According to the website, you already have 256MB stick of RAM installed and max for your system is 1GB. Now, in parenthesis it says "Requires replacement of the installed 256 DIMM", which to me says you need two 512MB 168pin sticks.
4.) It should, more RAM helps load times and I'm assuming that zoning is like loading in that game.