There are several versions of the workshop manual and apparently, the one I printed out does not have the supercharged Exige section.Have you read the install notes on BOE’s site? Might help for removal.
Edit: My manual has a section on supercharger removal. Section EH, not sure what manual you have.
It's not hard at all.
Remove the IC
Remove the intake off the throttle body. Disconnect TB from car whatever that involves for your car.
Take the belt off then take off the SC snout mount which means disconnecting it from the engine and the alternator.
Remove the SC support bracket from the SC and throw it in a lake
Drop the SC down out of the way.
Remove the intake manifold. 5 bolts, only the bottom center one is really hard.
When you reinstall use loctite on the supercharger to intake connection.
Do you have a press to do the snout?