(See answerbase # 7016 for more installation tips)-Turn on any third party extensions that you might need. -Restart the CPU with the new extension set selected. - Make sure you disable (usually done by disabling the appropriate extension) any third party applications that are running in the background...Norton File Saver, Disk Light, Virus software etc. etc. - After Pro Tools is installed successfully, locate the OMS applications folder and run the OMS installer and configure OMS. Pro Tools requires that you disable the "Use Apple Serial DMA Driver When Available" option. In OMS Setup(OMS Setup application/Edit menu/Preferences/Deselect "Use Apple Serial DMA Driver When Available"/Select OK) - If you're using a SCSI accelerator card to connect your external audio drives to your CPU please set the sync transfer rate to 10mHz. This effects the performance of your system and can directly effect PCI bandwidth issues and produce DAE 6042 errors during playback. SCSI accelerator cards are currently unsupported and are still being tested with Digi 001 systems. Look for compatibility documents in the near future. - Do not rename your system folder. - RTAS (Real Time Audio Suite Plug-ins) Plug-Ins provide features and functionality similar to their TDM(Time Divisional Multiplexing) counterparts, but are designed for use on non-TDM-based Pro Tools systems running Pro Tools LE software. Unlike TDM Plug-Ins, they rely on and are limited by the processing power of your computer. The more powerful your computer, the greater the number and variety of RTAS Plug-Ins that you can use simultaneously. Because of the dependence on the CPU or host processing, the more RTAS Plug-Ins you use concurrently in a session, the greater the impact on other aspects of system performance such as available track count, edit density, and automation. - Also please send in the registration card included with your system. As a registered user, you'll receive periodic software updates and notifications of upgrades.