DB Server Optimization On A Game Server Computer

I'm currently in the process of installing a mysql database server on my dedicated game server box. I was using shared hosting before, but i got a complaint from them that i was using too many connections and memory so i have to host the database myself.

Here's the stats of the server:

Dual Core Dual CPU Intel Xeon 3.0Ghz (2 core per cpu & 2 cpu's)
4GB RAM
120GB SATAII Hard Drive
Windows 2003 Enterprise Edition SP2 (180 Day Trial)

Currently, im hosting around 10 game servers on the machine with around 30% CPU load. I'm running with the page file disabled (its using 2 GB of RAM instead). Server runs fine like this (i heard its a performance boost, and it is). Over 2GB of ram are free at all times even when most of the game servers are full.

I want the database server to be able to as many connections are need from the game servers but at the same time i dont want to affect performance of the game servers. Any suggestions on what settings i should use?

I'm currently using these settings:

key_buffer = 512M
max_allowed_packet = 1M
table_cache = 512
sort_buffer_size = 1M
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 16M
max_connections = 100
query_cache_size = 128MB
query_cache_limit = 4MB
tmp_table_size = 30MB
wait_timeout = 120

P.S. The SQL will have 3 databases (AMXBans, SourceBans, & a RP character db). Everytime a player connects to one of my servers, their information is checked against the database if they are an admin. So in total i have around 126 slots for players to connect on.