Unfortunately, there are no companions to get. You generate an entire party of adventurers. Not just the one like in BG or BG2. You build the party you want and then take them all along for the ride. I believe you can still generate them as well. If you want them the same level as your main character you will have to download Dale Keeper and raise their levels.
Here is the link...
http://www.tgeweb.com/ironworks/icewind/cheats.shtml
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The line between good and evil is razor sharp. Be careful of misteps,
lest you find yourself spitted upon your own blade.