Spreading the server load?
 

What method should I use to spread my vBulletin installation across multiple servers?
I have two quad core servers ~2.2ghz each. The issue I am running into is that the lighttpd server and the server load is: load average: 14.16, 15.59, 16.06.

Code:
32046 lighttpd 20 0 68424 30m 17m R 14.3 0.9 0:55.11 php-cgi
32030 lighttpd 20 0 68440 28m 15m S 13.3 0.9 0:53.53 php-cgi
32025 lighttpd 20 0 85512 47m 18m S 13.0 1.5 0:55.41 php-cgi
32038 lighttpd 20 0 71936 33m 16m S 12.3 1.0 0:56.83 php-cgi
32057 lighttpd 20 0 67784 31m 18m R 12.3 1.0 0:54.84 php-cgi
32062 lighttpd 20 0 68576 32m 19m S 12.0 1.0 0:56.49 php-cgi
32019 lighttpd 20 0 68424 31m 18m S 11.0 1.0 0:55.28 php-cgi
32021 lighttpd 20 0 68496 29m 16m S 11.0 0.9 0:54.54 php-cgi
32051 lighttpd 20 0 68420 30m 17m S 9.3 0.9 0:55.07 php-cgi
32020 lighttpd 20 0 68532 32m 18m S 8.6 1.0 0:55.15 php-cgi
32023 lighttpd 20 0 67052 30m 18m R 8.6 0.9 0:55.51 php-cgi
32047 lighttpd 20 0 85948 50m 20m R 8.3 1.5 0:53.14 php-cgi
32076 lighttpd 20 0 68288 30m 17m R 8.3 0.9 0:55.53 php-cgi
32041 lighttpd 20 0 66820 27m 15m R 8.0 0.8 0:54.02 php-cgi
32078 lighttpd 20 0 66508 32m 20m R 8.0 1.0 0:56.76 php-cgi
32029 lighttpd 20 0 67668 29m 17m R 7.6 0.9 0:54.38 php-cgi
32075 lighttpd 20 0 70316 33m 18m R 7.0 1.0 0:55.22 php-cgi
32054 lighttpd 20 0 68668 32m 19m S 6.6 1.0 0:55.02 php-cgi
32080 lighttpd 20 0 68332 31m 18m S 6.6 0.9 0:54.86 php-cgi
32052 lighttpd 20 0 67956 27m 15m S 6.3 0.8 0:55.60 php-cgi
32059 lighttpd 20 0 68616 29m 16m S 6.3 0.9 0:55.52 php-cgi
32064 lighttpd 20 0 67308 29m 18m R 6.3 0.9 0:55.26 php-cgi
32068 lighttpd 20 0 68448 30m 17m S 6.3 0.9 0:55.05 php-cgi
32034 lighttpd 20 0 68928 31m 17m S 6.0 0.9 0:55.46 php-cgi
32079 lighttpd 20 0 68728 31m 18m S 6.0 1.0 0:54.56 php-cgi
32035 lighttpd 20 0 67664 31m 19m S 5.7 1.0 0:53.23 php-cgi
32058 lighttpd 20 0 67752 33m 21m S 5.7 1.0 0:51.66 php-cgi
32018 lighttpd 20 0 66740 26m 14m S 5.3 0.8 0:56.34 php-cgi
32031 lighttpd 20 0 85540 49m 20m R 5.3 1.5 0:55.35 php-cgi
32037 lighttpd 20 0 68500 29m 16m S 5.3 0.9 0:52.06 php-cgi
32050 lighttpd 20 0 67236 26m 14m R 5.3 0.8 0:54.35 php-cgi
32071 lighttpd 20 0 67600 28m 16m R 5.3 0.9 0:53.86 php-cgi
32073 lighttpd 20 0 66664 30m 19m R 5.0 0.9 0:54.69 php-cgi
32074 lighttpd 20 0 67416 30m 18m S 5.0 0.9 0:54.51 php-cgi
32042 lighttpd 20 0 67744 32m 20m R 4.7 1.0 0:52.69 php-cgi
32069 lighttpd 20 0 66560 33m 22m R 4.7 1.0 0:51.87 php-cgi
32061 lighttpd 20 0 66748 29m 17m R 4.3 0.9 0:53.99 php-cgi
32081 lighttpd 20 0 67512 32m 20m R 4.3 1.0 0:56.99 php-cgi
32024 lighttpd 20 0 66372 28m 17m S 4.0 0.9 0:51.70 php-cgi
32036 lighttpd 20 0 67040 27m 16m S 4.0 0.8 0:53.37 php-cgi
32039 lighttpd 20 0 67520 30m 18m R 4.0 0.9 0:51.95 php-cgi
32056 lighttpd 20 0 67112 29m 17m S 4.0 0.9 0:58.95 php-cgi
32063 lighttpd 20 0 68424 30m 17m S 4.0 0.9 0:51.54 php-cgi
32026 lighttpd 20 0 67016 30m 18m S 3.7 0.9 0:52.09 php-cgi
32028 lighttpd 20 0 66888 30m 18m S 3.7 0.9 0:54.23 php-cgi
32043 lighttpd 20 0 66164 31m 20m S 3.7 1.0 0:52.11 php-cgi
32044 lighttpd 20 0 67636 32m 19m S 3.7 1.0 0:55.17 php-cgi
32048 lighttpd 20 0 67444 28m 16m S 3.7 0.9 0:56.27 php-cgi
Currently mysql is being hosted on another server, and the load is still extremely high.
What should I do to better spread the servers load?

Webserver:
Code:
Intel C2Q Q6600
4096 MB DDR2 RAM
250 GB 7.200RPM
MYSQL Server:
Code:
Intel C2Q Q8200
4096 MB DDR2 RAM
500 GB 7.200 RPM