• New Upgradeable Hand Control Available from Celestron - 14 Jan 06
• How to Upgrade Hand Control Firmware - 14 Jan 06
• How to Upgrade Motor Control Firmware - 2 Feb 08
• Backlash and How to Set Anti-backlash Compensation - 7 Apr 03
• Power Sources for Your NexStar, CGE, CGE Pro, CGEM or AS-GT Scope - 9 Oct 05
• Questions about RS-232 Control and Upgrades via PC - 5 Jun 02
• Firmware Versions on the AS-GT Series
• Common Problems with PC to Scope Communications - 13 Jun 03
• Common Problems with PDA to Scope Communications - 4 Jul 04

• SkyScout Connect - Interfacing Your Scope with Celestron's SkyScout - 30 Nov 08
• NexStar Alignment Stars - 2 Dec 07
• Cancel a GoTo in Progress - 18 Jun 07
• StarGPS-NX - GPS Receiver for Celestron Scopes - 4 Mar 07
• Skyan - Basic Wireless Control of Your Telescope and Motorized Focuser - 7 Jul 06
• Use a Handheld GPS Receiver with Your Celestron Telescope - 7 Aug 05
• SCT Corrector Plate Removal - 15 Apr 05
• Replacing the Battery on the GPS Board - 21 Feb 05
• Ken Hutchinson's Article on Building a PC Port Adapter for the AS-GT Mount - 10 Dec 04
• Hand Control Compatibility between NexStar, CGE, CGE Pro, CGEM and AS-GT Models - 11 Apr 05
• AS-GT Review Posted at Cloudy Nights - 29 Sep 04
• Some Settings Are Not Reset by Factory Settings Command - 24 Sep 04
• Ports and Connectors on AS-GT Scopes - 27 July 04
• Polar Alignment Scopes for the Advanced Series Mount - 29 Mar 04
• Cleaning Optics - Part 1 - Glass Surfaces - 22 Mar 04
• Cleaning Optics - Part 2 - Mirrors - 27 Mar 04
• Collimating Schmidt-Cassegrain Telescopes - 15 Jan 04
• Unable to Successfully Complete 3 Star Align After Polar Align - 2 Jan 04
• Extending the Hand Control Cable - 23 Dec 03
• Get a Full 2" Aperture for Your 11" SCT - 11 Dec 03
• Runaway, Unsolicited and Missed Slews on AS-GT Scopes - Updated 4 Dec 03
• Pin Connections in Auto Guide Port - 24 Nov 03
• Peter Bruce's Article for Reducing the Height of the AS Tripod -  4 Nov 03
• No Response Errors - Updated 4 Nov 03
• Adjusting the Index Mark Locations on the AS-GT Mount - 6 Oct 03
• AS-GT Misses First Two Alignment Stars by a Wide Margin - 6 Oct 03
• Select Alignment Stars - A Program to Aid in Alignment - 8 Sep 03
• Mounting Various Optical Tubes on the Advanced Series Mount - 21 Aug 03
• Manual Hand Control for the Auto Guide Port - 31 Jul 03
• Celestron Now Offering Starbright XLT Enhanced Coatings on SCTs - 30 Jul 03
• Tripod Improvements - 5 Apr 03
• Basic Information about the AS-GT Series - 5 Apr 03
• Incorrect Date/Time Displayed on GPS Models During Quick Align/Auto Align - 5 Apr 03
• Problems Obtaining GPS Link - 24 Dec 02
• Jim Towers' Excellent Battery Tutorial and Guide - 7 Jun 02
• Correct Installation of the Finderscope on SCT Models - 26 May 02
• Possible Fixes for Hand Control Misbehavior - 11 May 02
• Ease Collimation of the SCT Advanced Series Scopes with Bob's Knobs - 11 Jan 02
• Warming the Hand Control to Prevent Sluggish LCD - 17 Dec 01
• Accurate Centering of Alignment Stars - 22 Aug 01
• Replacing the Power Connector on Your Power Source - 20 Dec 00

Another source for AS-GT information is the Yahoo Celestron_AS Group.  The discussions on the Group provide great information and you will find a list of Frequently Asked Questions (FAQ) in the Files section:
groups.yahoo.com/group/Celestron_AS