Achievement Help

Now that Halo 3 is released I would really like to move on and also reformat my computer and install Xp again. Before this I really want to get my last two achievements that have been giving me trouble

Decorated Soldier
Get awarded at least 8 different medals in one non-team game

This is hard for me because I haven't played many FFA games
and to get this achievement you have to get 8 different medials

Rainman
Play every available game variant, with at least 3 other players, to the end of each game

I really don't know why I haven't gotten this medal yet. I could have sworn Ive played a slayer, CTF, Bomb, Territory, King and Juggernaut game at least once. Also most servers host slayer and ctf games, and this achievement needs you to play with 3 other players on the lesser played gametypes.

So anyone needs these achievements and would like to help post your gamertag here/send a friend request to Wolfen Raged (Im a gold member btw). stating you need the achievements too. I only need 3 people to get these done.

For decorated soldier we would just let each other get these medals
Sniper kill, Road kill, Car jack, Sticky kill, beat down, assassination, killing spree, running riot/double kill

For rainman we would just play every game variant from start to finish. Might take awhile

For decorated solider, you would need a double kill or up, a killing spree or up, a splatter, sniper, melee, assassination, boarding a vehicle, and a stick. Zanzibar is the best place for it in my opinion.

And for rainman, you need to play EVERY Bungie-made gametype. Slayer, Team Slayer, Elimination, Swordball, Crazy King, EVERYTHING. Very annoying, but the best bet would be to create a server and invite friends to it.