[SixOfSpades]

Wow.....his very first post and he's asking for good advice for an Evil game! I'm quite touched, actually. If I weren't an undead Dracolich, it would have brought a tear to my eye.

As Eternal mentioned, the Naughty Boy threads have won popular and critical acclaim for their innovative techniques and unsuprassed dastardliness in the line of roleplaying pure Evil. You see, I normally play Good characters, but I decided that before I put BG1 away for good, I would play 1 Evil game. And, since I'd been storing up ideas for a long time, they all came out in a single game, resulting in the "I'm a Naughty Boy!" thread. Later on, that same character terrorized BG2, whence came "I'm STILL a Naughty Boy!" If you do a search for those titles, you will get the results you seek--but don't seek them. First, you should play your own Evil game, and see the types of wickedness that you've been surpressing.

My tips:
1) Be Neutral Evil. Sure, Chaotic Evil is arguably as Evil as you can get, but the Chaotic part means you usually can't plan too far ahead, and prevents you from entering into contracts that could really benefit you in the long term. On the flip side, being Lawful Evil means you can't take some sucker for everything he's got, and then betray him. No, Neutral Evil is clearly the way to go--squeeze 'em until there's nothing left to squeeze, and go for whatever brings you the richest rewards.
2) Don't worry about your Reputation being nice & high. While it is true that your Evil party members will hate you if you go above 17 Rep, there's no real harm in hovering around 15 or 16. If you're Neutral Evil, where's the roleplaying harm into fooling the populace into thinking that you're a great guy, and hailing you as a hero? It means more money for you, and it'll make it so much more satisfying when you slaughter all of their children.
3) The rule about not mixing Good and Evil NPCs is only a general rule. There are some NPCs that don't get along with certain others, and in those cases, one is always Good, and the other one is (almost) always Evil. But it takes a long time for actual hostilities to erupt, so you can easily do the Good guy's quest, suck up the reward for it, then strip them of their gear and abandon them in the middle of nowhere, with only 1 hitpoint.
4) Be creative. I don't know if you read Eternal's spoiler, but his story of the Paladin in the Graveyard is a perfect example of how Evil things can/should be done.