Hi Wilder. Parm 1 & Parm 2 correspond to the last 2 entries in the appropriate Payload entry for external weapons. Here's an example from the default Hellcat DP.
This is the corresponding entry in the DP when opened in Notepad.
[PAYLOAD.2]
mount.2=wep_pylon_hellcat, 1, -1
mount.3=WEP_US_250lb_GP, 1, 5
mount.4=wep_pylon_hellcat, 1, -1
mount.5=WEP_US_250lb_GP, 1, -1
Parm 2 with a value of 5 means that this mount is triggered by mount.5. In this case both bombs will drop together. To drop them separately change Parm 2 to -1.
It must be well over 2 years since I did any of this stuff so I had to do a crash refresher course. I find the text files included with MW's weapons libraries a great help. In fact this is where I got most of my knowledge of DP editing. I copied this from Payloads.txt included with his Extra Weapons Package. (wep.zip).
http://www.mnwright.btinternet.co.uk/cfs2/weapons.htmPayload Creation
The CFS2 Dp Payload sections seem to work in the following fashion :-
[PAYLOAD.#]
mount.#=<weapon_name>,<number_of_weapons>,<other_mount_to_fire>
The number_of_weapons will usually be 1 but sometimes (like for Bombs
carried internally) this may be 2 or more. If so then it will act like
"ammunition". You can fire this "weapon" that number of times.
The other_mount_to_fire is -1 if the weapon fires alone (or for pure "mounts"
that don`t actually fire anything) otherwise it is the number of the
companion mount
As with most things in this hobby I find that it's much easier to modify an existing DP than create one from scratch as all the entries should be set up properly. All you need to do is reposition them to suit the aircraft.