You should never delete pieces of this plug in, it puts stuff in too many places and you WILL have a broken site by deleting only some. It heavily modifies .haccess as well.
Your best bet would have been to enable debug in WP (in config.php) and post the error messages you got.
Now you put yourself in a less than pretty situation.
Your best bet is to restore the bits you have removed, and post the errors you get with debug activated.