Add additional associative array in 2x2 multidimensional array but perserve key

Howdie do,

I have one multidimensional associative array of server types. This array contains a sub array of values.

It's easier to see:

$servers = array('Dell R410 Dual Xeon X5650 Hexacore 2.66 GHz' => array('Model' =>$R410Model, 'Description' =>$R410Desc,'Counter' => $R410HexCoreE5650Count));

I want to add additional server type associative array. This is what I've done:

$servers[] = array('Atoms D510 1.66Ghz' => array('Model' =>$AtomModel, 'Description' =>$AtomDesc,'Counter' => $AtomCount));

$servers[] = array('Celerons 2.40Ghz' => array('Model' =>$CeleronModel, 'Description' =>$CeleronDesc,'Counter' => $CELERONCount));

It does add the value, but it does it by index and not the actual server type key.

Array ( [Dell R410 Dual Xeon X5650 Hexacore 2.66 GHz] => Array ( [Model] => DELL R410 [Description] => Dual Xeon X5650 Hexacore 2.66 GHz [Counter] => 25 ) 

[0] => Array ( [Atoms D510 1.66Ghz] => Array ( [Model] => ATOM [Description] => D510 1.66Ghz [Counter] => 1 ) ) 

[1] => Array ( [Celerons 2.40Ghz] => Array ( [Model] => [Description] => [Counter] => 0 ) ) )

How do I move the sub arrays up one so that it adds them by key and not index. So that it looks like this

 Array ( [Dell R410 Dual Xeon X5650 Hexacore 2.66 GHz] => Array ( [Model] => DELL R410 [Description] => Dual Xeon X5650 Hexacore 2.66 GHz [Counter] => 25 ) 

 Array ( [Atoms D510 1.66Ghz] => Array ( [Model] => ATOM [Description] => D510 1.66Ghz [Counter] => 1 ) ) 

 Array ( [Celerons 2.40Ghz] => Array ( [Model] => [Description] => [Counter] => 0 ) ) )