Hello Need a few suggestions. Presently running. INTEL R CELERON R CUP 2.40GHZ 1.0 GB RAM XP. Use the pc mostly for OCR software work, some simulator flying, some photoshop. Thinking of upgrading to dual core chip any suggestions of type and mother borad. Has to be very stable as this is a work system. Other question is what increases in software speed could I expect. Thanks in advance. Douglas