Upgrading brakes - How do you remove this cover...?

Hi guys, just had a read of the list of things i need to do a rear disc conversion, but theres a couple of things im unsure of..
Im getting all the parts off a Del Sol Sir, im pretty sure theyre the same as eg parts but can anyone tell me for definite?
Also, in the parts list it mentions a rotor, a brake booster and a proportional valve - what are these
Im a bit of a n00b with brakes - havent done any work on them yet so this will be a big learning curve!
Any help is greatly appreciated!
Graham
Im getting all the parts off a Del Sol Sir, im pretty sure theyre the same as eg parts but can anyone tell me for definite?
Also, in the parts list it mentions a rotor, a brake booster and a proportional valve - what are these

Im a bit of a n00b with brakes - havent done any work on them yet so this will be a big learning curve!
Any help is greatly appreciated!
Graham