I thought I might be able to be a little help...
CB- I don't know how technical you want to get, but to put it faily simply, the 3 mg
Xanax XR is not going to be "stronger" than your old
Xanax 1 mg. In the XR (extended-release) tablets, the medication will be released into your blood stream over the course of the entire day (rather than all at once, which is the case with the "regular" immediate release tablets). You might even find the Xanax XR 3 mg tablets help you combat your anxiety more than taking 3 separate 1 mg doses because the levels of the medication in your blood should remain faily constant (at a theraputic level) throughout the whole day. If you have any other questions, hopefully I can help.
diphns- The yellow "totem pole" looking tablet that is scored 3 times (into 4 sections) with the imprint that you described is a 2 mg
Alprazolam (generic Xanax) tablet made by Alpharma. This is not an extended release (XR), it is an immediate release tablet.