Computer geeks has an Intel 945p btx board for $16.99 plus shipping. It will work with your old pentium 4 cpu, but not newer core2 duos. A few 965 chipset boards are available in btx form factor that will work with older core2 duos at 1066 fsb if you search. And a few newer chipset boards are availble in the uk if you live there. Start by searching ebay for btx boards if the geeks board doesn't interest you. And your dell software may not work with a different motherboard. You may need a new operating system.