i need advice, on a cheapest mining rig with just 2 vga, with no case

MOB: cheapest one, there is anything around 50 euro?
CPU: adm or intel?
RAM: 4 gb
VGA: 2x 7950, gigabyte maybe? or vapor-x?
PSU: a 650w would be enough, tell me the best
HDD: no issue, i have already one

it's possible to stay on 550 euro at max, $750usd

dunno if is p2pool not correct or what, but in my host site it say "Expected after mining for 24 hours: 0.0277 LTC per block"
isn't this too low, for 520KH rate?
in litecoin calculator site, it say that i should receive 0.05 litecoin per hour

i dunno why, but with Bitcoin i'm fine, i get 600 at 1150 and nice temp with my vapor x

but when i decide to mine litecoin the hashrate is just 15kh, i can only increase it by putting intensity to 14 or above(but it still no where near 500kh)

i'm using p2pool(with --net litecoin) 11.2(11.4 is bad, to many reject and highter latency) and cgminer(with --scrypt) 3.0.1, thats it, i should add something else maybe?

i'm using 13.4 drivers

i setup everything correctly, block are accepted ecc..., but where my bitcoin are displayed? in my bitcoin client directly?

hi, i can't get why my mhash per sec is only 2.7 on guiminer while solo mining(i have a 670, so it should be around 100mh/s)
it's supposed to be that low, if you solo mining?

p.s. i know that isn't profitable, but i want try just for fun, to learn alla the things about bitcoin

i can't understand what the difficulty mean, when you mine, setting this value to high is better?