We are currently operating using an older model HP LaserJet 4. We would like to use this unit just for envelopes and labels. We are currently not able to have the envelopes feed automatically and have to press a button for each envelope to print. Does anyone know if there is a way to get them to feed automatically, or if there is a software out there that will do this function. We have tried with Windows and Correll, and it will not continuously feed the envelopes. Thank you in advance Meg