Open CD in command prompt....

You can write a vb script to do that, then just execute the script from the command prompt.

Create a txt file called "opencdtray.vbs"

Open the file, and copy this into the document and save:

Set oWMP = CreateObject("WMPlayer.OCX.7")
Set colCDROMs = oWMP.cdromCollection

For i = 0 To colCDROMs.count-1
colCDROMs.item(i).eject
Next

oWMP.close

Looks like looping through the drive collection again calling the eject method will close the drive. So you could modify with something like this using a MsgBox as a "pause" in between the open and close.

Set oWMP = CreateObject("WMPlayer.OCX.7")
Set colCDROMs = oWMP.cdromCollection

For i = 0 To colCDROMs.count-1
colCDROMs.item(i).eject
Next

MsgBox "Close",0,"Disc drive"

For i = 0 To colCDROMs.count-1
colCDROMs.item(i).eject
Next

oWMP.close

You can play around with it more if you like...