WRT the garage door opener:

• In 2012, garage door opener security adopted a new "rolling code" protocol that is not compatible with previous remotes (like our Crossfire)
• However, there is a solution - Buy a Homelink Compatibility Bridge for @ $25 sold wherever garage door openers are sold (HomeDepot, Lowes, Ebay, Amazon, etc.)
• The Bridge will accept the old opener signal and convert it and retransmit it as a rolling code to the opener
• But, you will lose the added security of the rolling code protection by using a Bridge
  • Evil doers MAY be able to open your garage by randomly selecting old codes with their own remote
  • The risk may be small: after 6 years of new garage opener sales, it is doubtful that thieves will be wasting time with the old technology

Our opener died and was replaced in 2012. I took the risk and installed a bridge when they became available as our vehicles had lost the convenience of having the HomeLinks
Cheers,