would this be a place for select case?
You could, but it just uses more code space. It's pretty much a Select Case the way the last example is shown. But here's a Select Case version...
Code:
combo:
    Select CASE combocount
        Case 0 : if ByteA = 7   then GoodKey
        Case 1 : if ByteA = 8   then GoodKey
        Case 2 : if ByteA = "A" then GoodKey
        Case 3 : if ByteA = 5   then GoodKey
        Case 4 : if ByteA = "D" then GoodKey
    END SELECT
    combocount = 0
return
    
GoodKey:
    combocount = combocount + 1
    if combocount = 5 then GrantAccess
return
Or, just to keep things nice and confusing, you could also do this...
Code:
Combo:
    Lookup  combocount,[7,8,"A",5,"D"], NextDigit
    if ByteA = NextDigit then 
        combocount = combocount + 1
        if combocount = 5 then GrantAccess
    else
        combocount = 0
    endif
return
It seems as though the THEN Goodkey scenerio would make the combination work if out of sequence?
Nope, that can't happen. You should run the program in MCSP debugger and watch what happens. After watching debuggers for awhile, you'll be able to see it in your mind, and programming will go a lot smoother. And eventually, you won't even need the debugger anymore, or the PIC. It'll run inside your head.

Oh your code works SWEET! Thanks Again.
No Problemo!