No cd or fixed exe? Please help!

[Masterofpuppets]

Ive just bought Myst Exile, and want to make a copy of it for the pc upstairs so my brother and I can play it at the same time. Things is, with a no cd patch, you need to install it fully +- 2gb which the pc doesnt have, so i was wondering is there a patch that removes the copy protection so it will copy right, but can still check the cd for data when you play so you dont have to fully install it. Hope that makes sense! Are such patches called fixed exe's, or is that just another name for the no-cd patch?
Appreciate any advice/help from anyone! Thanks!

Master!