CURRENT PROJECT COMPRISES MULTIPLE 3D MODELS CREATED BY CONSULTANT DESIGNERS. wHEN X-REF'D FILE COLLECTION OF 41 FILES BUILDS A 982KB FILE, WHEN BOUND THIS BECOMES 1.4GB CURRENT SYSTEM VISTA P.C. WITH 16GB RAM 64BIT PROCESSOR. CONCERNED THAT SYSTEM WILL STRUGGLE TO HANDLE FILES WHEN ENGINEERING CO-ORDINATION PROCESS STARTS. NAVIS SIMULAT TAKES 28.4MINS TO OPEN THE XREF'D FILE, SOMEWHAT SLOW.... ANY IDEAS AS TO THE SPEC OF SYSTEM THAT SHOULD BE CONSIDERED.