Just thought I'd share that when trying to IR sync a Treo 90 with a ThinkPad, make sure you (i) start the sync first THEN (ii) move your Treo to the IR range of your notebook. I noticed that if I brought my Treo within range, the IR facility on my ThinkPad will kick in first because the IR BEAM was on my Treo, hence, the sync fails because it thinks the IR port is already in use.

Regardless of notebook you are trying to IR Sync with, instructions to sync via Infrared are here:


Have fun!