And then I have to do the stereo... I don't even know what speakers will fit in the doors... Any hints?

No idea. Best bet is to get a manual for it (Bentley?) or find a Subie message board and ask around. Hmm I guess you could ask the dealer as well...

I have a 1999 S10 that I put a Corvette LT1-V8 into, parked in the garage, so I'm not into modding at all.

Haha, sweet

Enjoy!
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Hello, my name is Bingo. I like to climb on things. Can I have a banana? eek eek.