It's pretty straight forward don't worry, just make sure you work slowly and methodically..
I did it to my first car, a Mk2 Golf. I got hold of a 16v interior from a breakers nice and cheap. Got the carpets, the seats, door cards, pillar trims, roof lining the lot. I got it all home, and started stripping the car starting with the seats, doorcards, then the carpets and roof lining etc. Putting everything back is just the reverse of how you took them out. Start with the carpet (and give a good clean etc whilst it's in) then door cards, seats etc etc..
A good tip is to make sure you have some spare fixing clips handy as you'll be surprised just how easy these can break when trying to prise them off (especially the door card ones). There is nothing worse than trying to chase down those annoying rattles from inside the car ÂÂÂ

But maybe I'm just a perfectionist.. Also if the seats have a wobble get yourself a new set of clips for those too..
Shouldn't take you too long to switch it all over, just take your time... it's easy!
Hope that helps, and good luck ÂÂÂ
