Vista Ulitimate 64 ~ Media Center works with Hauppauge HVR 1600, or Vista has 4MB memory . Not both.

I recently added two additional 2 MB of memory to my system for a total of 4
1MB sticks.

Vista 64 showed me that I had 3MB until I changed a BIOS setting under
Advanced>CPU Configuration>Memory Settings where I changed "Hardware Memory
Hole" to "Enabled"... then Vista sees all 4MB, but then Media Center goes
from sometimes smooth, somtimes choppy.... to not getting any kind of video
signal.

So I either have TV with Media Center with 3MB... or I have no TV and 4MB of
memory.

Both would be nice.

My system is an ASUS A8N32-SLI with an AMD FX60, 4MB PC3200 Corsair DDR,
three SATA drives (root JBOD, two identical striped drives in an NVIDIA
array). NVIDIA GEforce 7300 GT video cards with 512mb memory.

Any thoughts how to get both workinng?