Sure you can
obviously you'll have to work a bit
1) save all animation from "character studio", by click on the floppy icon, the file must be in .bip format !
now, when you have your compilation with 157 bip files you're reday to step2
2) create new file, with the biped, in character studio go to MixerMode
(the 4th tiny icon in character studio) then click on the Mixer button.
that will bring up the mixer
on the light gray bar on top, click with the RMB "new clip"->"from file" and load the first Bip file.
cool ! \o/
you can load on this way all the animation that you made, but you've didn't done yet :p
now that you have a 10576 frames animation, (be sure that Bip001 is selected) go to Mix menu, and then click on "Computete Mixdown"
that will "collapse" all animation in one single ...."clip"
uncheck - Enforce IK Constrains
uncheck - Filer Hiper-Extended Legs
check - A Keyframe per Frame.
once you've done.. you can export it !