I have connected my tb over a vga connection to my pc. i can get a good picture at 720x480p, but i cant seem to get 1080i working. first of all i know its interlaced and the timings are confusing. i know i need 1920x1080 right? i need to set that up as an interlaced mode? what are the correct timings for HD1080i on a CRT? i have an nvidia geforce card with just vga so dvi is not an option. can anyone help? thanks.