While not for recording, I have used the SIR-T150 for viewing on a PC via use of its RGB output. I actually kept a couple of those old units for just such a purpose. I took a very old 19 inch tube TV in a spare bedroom out and replaced it with a SIR-T150 hooked to a 19 inch computer monitor and have it hooked to a spare pair of powered computer speakers. I have a friend with a spare T165 and one of these days I may snag it just for laughs. I assume you hooked it up with a 6 pin to 4 pin firewire cable?
Main System (Integrated AV)- Lumin U1, Modwright LS36.5 DM Preamp, Modwright KWA150SE Amp, EMM Labs DAC 2X (ver. 2), Torus RM-20, Thiel CS 3.7s, 2 Rel Storm III subs
Back-up 1 - HAL MS-2 Music Server, Odyssey Candela Preamp, Bryston 3BST Amp, Meitner MA-1 DAC, 2 Richard Gray cond, Ohm Microwalsh Talls, Rel Strata III sub
Back-up 2 - (Integrated AV) HAL MS-3 Music Server, Sherbourn Pre-1, Emotiva XPA 200 Amp, Teac UD-501 DAC, Vansevers cond, B&W P6s, Rel Q150 sub