08 or 06 will work here, identical setup for both of them.
i dont understand why defining the straight path is confusing to some people but i am working on some examples and a manual to help with this. here are some tips though.
lets take a signal in the image above, say the lower left one.
to set this up we need to know 2 things.
1. what we want this signal to consider the straight or normal path.
2. the number of junctions this signal needs to 'see'.
both of these are defined with the L, R, F links in the properties panel. now in case you couldnt figure it out, L is for LEFT, R is for RIGHT, and F is for FORWARD. F is there because its possible to create a 3 way switch in trainz that will return that value.
now back to the signal. if i look down the track i see that in order to go straight, the first junction must be set to the LEFT. easy enough yea? so i set the first entry to L. now here is where it might get tricky, i come to the next junction, and in order for me to pass through it, it needs to be set to RIGHT. there are no more junctions for this signal to look at, so i have my end result of:
L,R