The code was written in C-Script, so for using in Lite-C you will have to do some changes.
distance = vec_dist(you.x,Player.x); //Distance between player and enemy (you is enemy)
distance /= 10; //scale down the distance by 10
//calculate the angle
vec_set(temp,you.x);
vec_sub(temp,Player.x);
vec_to_angle(Winkel.pan,temp);
Winkel.pan -= 180; //for correct alignment
//calculate the screenposition of the point
temp_panpointer.pos_x = guiradar_pan.pos_x + (guiradar_pan.size_x/2) * guiradar_pan.scale_x - distance * cos(Winkel.pan);
temp_panpointer.pos_y = guiradar_pan.pos_y + (guiradar_pan.size_y/2) * guiradar_pan.scale_y + distance * sin(Winkel.pan);
temp_panpointer.pos_x -= (temp_panpointer.size_x/2)*temp_panpointer.scale_x; //use the middle of the radarpoints and not the upper left corner
temp_panpointer.pos_y -= (temp_panpointer.size_y/2)*temp_panpointer.scale_y;
//Hide the points if they are outside the radar panel
temp = sqrt(pow(distance * cos(Winkel.pan),2)+pow(distance * sin(Winkel.pan),2));
if(temp > (guiradar_pan.size_x/2) * guiradar_pan.scale_x -12)
{temp_panpointer.visible = off;}
else {temp_panpointer.visible = on;}
First of all I want to thank you guys for your numerous answers

The problem with the server costs is indeed a big problem... It would be great, if users open up servers (like in cs). But for the start I have to offer a few servers of course. Maybe I can find some sponsors or something like that. I have to think about how I will solve this problem.
I'm currently creating the designdocument. It progresses rather slow, because I have not that much time for this project currently...