Yes. You can, but it'll work like sheeeit.
For 10 meg, just swap the orange and green pairs - IF its a standard 568B cable.
Even cheapo leviton jacks like HD carries can be terminated with the stuffer cap it comes with.
Saint - in an emergency, I've had customers ask me to splice Cat5E cable -- which I've done by soldering -- preserve the pairing and twist count, and 9 out of 10 will still pass testing at 100M speeds. So sayeth my Pentascanner.