AcquireSupport is an object, so you have to create it. Do not initialize it, I think you can get away with calling LocalTopocentricToJ2000() with an uninitialized AcquireSupport. Initializing is really heavyweight and requires a lot of stuff to be running,etc.

Code:
Set SUP = CreateObject("ACP.AcquireSupport")
SUP.LocalTopocentricToJ2000 Util.ScriptTelescope.RightAscension, Util.ScriptTelescope.Declination
YourRA = SUP.J2000RA
YourDec = SUP.J200Dec
Set SUP = Nothing  ' Releases it right away