If you only need to capture from SP, get a Sony J30 VCR.
That'll squirt SP down firewire with T/C, drop dead simple and you get full machine control. The J30 lets you catpure SP, DB, IMX and SX down firewire. If you're in the serious end of the game they're a good investment. If you want to go a bit more upmarket then the JH3 with the firewire card adds HDCAM and CIneAlta, of course only as DV25 into Vegas though.
Bob.