Fiting modified oil rail after MLS gasket has already been fitted?

I'm new to car mechanics but trying to get stuck in so bear with me...

I've had my 1.8 Freelander 51 plate back from the garage for 1 week now following early signs of head gasket failure - It was loosing coolant via the water pump. It now seems to run very well but the coolant is full of sooty bits - I plan to use a cleaning agent, then flush out the rad and engine.

The garage fitted a BGA Head Gasket kit, BGA Head Bolts, new water pump, new sensor, new housing, new timing belt. The head was skimmed and pressure tested. It already has the modified thermostat placement since it is 51 plate.

I've only just read about HG failure on the K-series engine and didn't know about it when I bought the Freelander, otherwise I would have specified the LR MLS Gasket and the LR Oil Rail when the work was done.

My concern is that the new Oil Rail Ladder (LCN000140L) was not fitted. Should I fit this myself?
Is it just a case of removing the exhaust front pipe and then the sump, fitting the new rail then refitting a new sump gasket, sealing then refitting the sump?
Or do the head bolts also secure the Oil Rail making replacement more complicated?

Any advice would be very appreciated.

Thank you!
Tommy

The head bolts go all the way into the oil rail, so you'll need to undo these. Ideally it needs to be done at the same time as the head gasket to save doing jobs twice.

If you want to go ahead and do it, you've an excuse to swap the gaskets with the modified LR ones. It's quite a simple job in all.

Wouldn't worry about the OE gasket, or oil rail, I ran a MLS gasket for 30k miles without the modded rail, no problems.

Just had the head off to sort a valve issue and have fitted the OE gasket, biggest incentive was the price.
MLS have fairly shot up in price since 2006 and I got mine a few months after they hit the market.