Well wayne dont lose sleep mate, and allow people to have some fun
He is letting people have fun, but for £200 you won't get very far.
As Wayne mentioned you will need the M62 as the M45 is designed for a smaller engine. You will also need to fabricate brackets and piping as well as buy couplers and have a remap done (that's £150 alone for this engine).
As Kells said, you will need new management if you want decent output. I think the standard ECU can be made to work with boost, but only on very low pressure as it's not designed to run boost.
Then you've got gearbox and engine, they're not designed to take boost. The 020 gearbox will implode if you chuck a supercharger at it, so you're better off using an 02A or 02J. The engine is also not up for boost. You can run low pressure boost without building a forged engine but if you've got a supercharger, and you're spending money you might as well run a decent amount of boost otherwise it's money wasted.
You're looking at around £800 minimum to run a low pressure system.