Since Heli Traffic 2009 is an extremely popular program, I wanted to make a point to airport developers who substitute one of their own custom helipads for one of the default FSX helipads. One would think that a custom helipad, a helipad start, and a helicopter scheduled to use the helipad would be all that Heli Traffic 2009 would require to use a custom helipad for AI helicopter traffic. That is not the case. Enabling Heli Traffic 2009 to use a custom helipad requires that one of the default FSX helipads be placed beneath the custom helipad. Without an accompanying default helipad, Heli Traffic 2009 users would have to land (or place using the FSX menu) a user-piloted helicopter (or other user-piloted aircraft) at the custom helipad, and they would have to tell Heli Traffic 2009 that the location of the custom helipad (the current location of the user aircraft, really) is a helicopter landing spot. Both of the preceding steps are steps that shouldn't be necessary for Heli Traffic 2009 users, and the steps can be avoided easily by making sure that any and all custom helipads at airports are accompanied by a default FSX helipad. Just locate the custom helipad slightly above the default helipad to assure the default helipad's textures are not revealed.
NOTE: I define "default helipad" as being the same as one of the four FSX helipads available via the Airport Design Editor add-helipad function. The four available are: H, Square, Circle, and Medical. In other words (and for example), even with one of the FSX starts and FSX lighted helipads present, the placement of an H, Square, Circle, or Medical helipad is required beneath the lighted helipad to enable use of the helipad for Heli Traffic 2009 AI helicopter traffic. Heli Traffic 2009 sees any helipad that is not a default FSX H, Square, Circle, or Medical helipad as being a custom helipad, and Heli Traffic 2009 knows nothing about custom helipads.