is there a way to determine where planes will spawn on an airfield?

[salmo]

Played around with custom airfields (again). Here's a sample mission, is this something like what your looking for?

[PARTS]
  core.100
  bob.100
[MAIN]
  MAP Land$English_Channel_1940
  BattleArea 134090 197588 126712 71120 10000
  TIME 12
  WeatherIndex 0
  CloudsHeight 1000
  BreezeActivity 10
  ThermalActivity 10
[GlobalWind_0]
  Power -3.000 0.000 0.000
  BottomBound 0.00
  TopBound 1500.00
  GustPower 5
  GustAngle 44
[splines]
[AirGroups]
  BoB_RAF_F_FatCat_Early.03
[BoB_RAF_F_FatCat_Early.03]
  Flight0  1 2 3 4 5 6
  Flight1  11 12 13
  Class Aircraft.SpitfireMkIIa
  Formation VIC3
  CallSign 26
  Fuel 100
  Weapons 1
  SetOnPark 1
  Skill 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
[BoB_RAF_F_FatCat_Early.03_Way]
  TAKEOFF 154822.94 253682.82 0 0
  NORMFLY 153558.24 252965.48 500.00 300.00
[CustomChiefs]
[Stationary]
  Static21 Stationary.DH82A gb 155594.61 253089.56 -570.00 
  Static20 Stationary.DH82A gb 155612.44 253076.36 -570.00 
  Static19 Stationary.DH82A gb 155666.94 253061.11 -570.00 
  Static18 Stationary.DH82A gb 155692.14 253064.02 -570.00 
  Static17 Stationary.DH82A gb 155767.73 253101.56 -570.00 
  Static16 Stationary.DH82A gb 155784.02 253120.58 -570.00 
  Static22 Stationary.DH82A gb 155432.28 253241.27 -570.00 
  Static26 Stationary.DH82A gb 155239.95 253268.86 -570.00 
  Static25 Stationary.DH82A gb 155275.61 253284.28 -570.00 
  Static24 Stationary.DH82A gb 155302.17 253288.06 -570.00 
  Static23 Stationary.DH82A gb 155412.22 253256.52 -570.00 
  Static15 Stationary.DH82A gb 155815.22 253313.77 -570.00 
  Static14 Stationary.DH82A gb 155804.08 253336.73 -570.00 
  Static13 Stationary.DH82A gb 155730.19 253455.19 -570.00 
  Static12 Stationary.DH82A gb 155713.56 253473.19 -570.00 
  Static27 Stationary.DH82A gb 155569.47 253526.27 -570.00 
  Static28 Stationary.DH82A gb 155591.97 253510.20 -570.00 
  Static11 Stationary.DH82A gb 155718.53 253599.86 -570.00 
  Static10 Stationary.DH82A gb 155725.91 253624.72 -570.00 
  Static9 Stationary.DH82A gb 155657.69 254181.47 -570.00 
  Static8 Stationary.DH82A gb 155663.00 254206.33 -570.00 
  Static7 Stationary.DH82A gb 155626.66 254440.14 -570.00 
  Static6 Stationary.DH82A gb 155623.23 254464.81 -570.00 
  Static0 Stationary.DH82A gb 155157.48 254551.92 -570.00 
  Static1 Stationary.DH82A gb 155178.41 254569.38 -570.00 
  Static2 Stationary.DH82A gb 155293.09 254615.14 -570.00 
  Static3 Stationary.DH82A gb 155318.80 254613.61 -570.00 
  Static5 Stationary.DH82A gb 155400.56 254695.72 -570.00 
  Static4 Stationary.DH82A gb 155407.77 254717.83 -570.00 
[Buildings]
[BuildingsLinks]
[Airdromes]
  airdrome0 155248.79 253789.79 1 550 500 1
[airdrome0_Runways]
  155269.81 254111.92 -115.00 1500.00 50.00 0
[airdrome0_Points]
  154903.26 253767.17 1
  154849.07 253753.02 29 27 2
  154839.23 253783.78 3
  154849.59 253799.93 4
  154921.82 253823.70 5
  154957.48 253847.17 6
  154987.96 253876.12 7
  155016.30 253909.34 8
  155038.55 253945.92 9
  155057.14 253978.53 10
  155069.63 254009.00 11
  155084.57 254048.62 12
  155097.37 254098.30 13
  155105.90 254136.70 14
  155112.30 254172.97 15
  155113.83 254213.20 16
  155116.26 254380.52 17
  155118.40 254413.13 18
  155127.24 254448.17 19
  155149.48 254492.37 20
  155169.90 254521.93 21
  155202.21 254553.62 22
  155252.80 254574.04 23
  155301.87 254576.48 24
  155364.96 254567.64 25
  155410.06 254555.45 26
  155442.32 254532.94
  154818.15 253752.25 28
  154798.15 253769.42
  154855.86 253727.41 31 30
  154806.75 253715.78
  154868.54 253688.24 35 32
  154894.04 253697.98 34 33
  154924.75 253689.53
  154915.52 253724.18
  154876.92 253660.97 40 36
  154850.68 253652.81 39 37
  154836.82 253636.90 38
  154832.77 253612.07
  154817.35 253670.47
  154889.88 253622.09 41
  154901.76 253589.14 45 44 42
  154925.61 253610.64 43
  154934.28 253640.09
  154856.43 253574.27
  154918.51 253532.66 46
  154946.15 253492.73 47
  154959.87 253466.85 48
  154984.61 253456.64 49
  155441.10 254530.29