Removing EJ-DE rocker cover to put in new gasket. Painful?

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So I've tried removing the rocker cover but noticed it's stuck under the throttle body. So I tried removing that also but some things first have to be removed from the throttle body. I couldn't get the thing off that the throttle body attaches to. Anyone know if there's an easier way of removing the rocker cover? Or Why they make It so frustrating?

Also does this manual cover the L250 / EJ-DE? Does it include anything about the engine or braking system?

((Daihatsu Cuore / Mira / Kelisa / L701 Service Manual DOWNLOAD = £10
This covers the Cuore/Mira (Early 1998 onwards). NOTE: This manual references another manual which is not available, for aspects of engine and braking system. )))