Honestly, if you can afford it, I'd just buy a TCR. If they don't let my rifle into the country when I move then I'm gonna get one myself
I found this link: http://www.pbnation.com/showthread.php?t=3391855&page=3
It's a few years old but it looks to me like, while you CAN rig a 98 to do it, it still won't fire like a marker intended to do so. Which makes sense.
Why do you wanna go FSR? Is it the mag-fed aspect, or the accuracy?